Outgrowing the Arcology

Written by Dilandau ([email protected])

Disclaimer: you know the drill: this story contains scenes of a sexual nature, and breasts of ever-increasing dimensions. If you’re too young or – for reasons that I’m unable to fathom – don’t like large breasts, then you probably shouldn’t be reading this.

Note: despite the fact that this story is set in Japan and despite some comments about the metric system in this part, all cup sizes in this story are based on the current European, inch-based system. I don’t really have a “feel” for the Japanese centimetre-based bra sizes myself, so I’m not using them.

Part 2: Combined effect

Two weeks had passed since Mike, Michelle, Rose, Kimiko and Maaya had first started taking the rejuvenation formula. This, Mike knew, meant it was two weeks and two days since he and Michelle first had sex. The memory was burned in his mind – not least of which because he had also confessed he loved her on that day – but what he would never have guessed at the time is that with that one small trickle he ended up opening the floodgates.

Simply put, after Michelle had made him wait for nearly three months since they started dating, it now seemed there was no end to her desires. He didn’t know if she was normally this randy, or if it was the increased libido that the experimental rejuvenation formula was supposed to cause, or the extra hormones from the breast augmentation formula that she was also taking – or maybe a combination of all three – but Mike could barely keep up with her. Not that he was complaining, mind you.

It was early morning after another sex-filled night, and Mike and Michelle were getting ready to go to university. Mike sat on the edge of Michelle’s bed while she was in the bathroom, and he carefully examined his cock and balls. He didn’t know if it was his imagination, but his penis seemed just a bit larger than before. He thought that perhaps their frequent sexual encounters were the reason that his equipment felt a bit sore and swollen; he couldn’t recall that it had ever gotten this much exercise before.

But who had ever heard of someone’s dick growing bigger just from having sex? Maybe it was an unintended side-effect of the formula. He made a mental note to ask the doctors this afternoon during the weekly check-up which they were required to undergo as test subjects for Professor Tamura and Madihi Labs.

But if the rejuvenation formula was the cause, it was definitely not something that was supposed to happen. No changes in appearance, that is what Tamura had guaranteed, except for maybe becoming a bit fitter. The formula wouldn’t even really rejuvenate them; all it could do in its current experimental state was give them increased strength and stamina, improved senses, a more efficient metabolism, and a few other minor effects. It was very impressive of course, but actually being able to attain eternal youth was still a good way off, according to some of the scientists they had talked to.

So far, none of those effects were really apparent yet. Mike definitely hoped the increased stamina would kick in soon at least; he needed all the help he could get to cope with Michelle’s never-ending sex drive.

As he got up and pulled on his briefs, Michelle walked through the bathroom door into the bedroom of her small apartment in the Tokyo Arcology. She had just taken a shower and was brushing her still slightly damp long dark-brown hair. She had a fluffy white towel wrapped around her gorgeous body, which was just short enough to make Mike compulsively glance at its bottom edge in the hopes of getting a glimpse of the promised land that lay beneath; he had to admit that Michelle wasn’t the only one with an unusually high sexual appetite as of late.

“Morning, sweetie,” she said. “Did you sleep well?”

“Are you kidding?” he laughed. “I’ve been completely knocked out every night for the past two weeks, thanks to you.”

She kissed him on the cheek playfully. “I’ll take that as a compliment.”

“As it was intended.” He put a hand on the side of her face and kissed her tenderly. Then, his fingers traced down her neck, past her collarbone, and continued down to the valley between her breasts.

“I checked my biometric chip data again just now,” she said, noticing his interest. “I’m officially a C cup!”

Mike studied the outline of her breasts through the towel. They were marvellously full, and the amount of cleavage displayed above the towel was definitely larger than before. Yet they still felt completely natural, as soft and firm as before, and judging from her reactions during their frequent love-making sessions, hadn’t reduced in sensitivity either; rather the opposite. It was already an impressive result, and they weren’t done yet, though Michelle still refused to tell him what final size she had selected, preferring to keep him guessing.

Mike thought to himself that he should probably send a thank-you note to Kimiko’s aunt. As Kimiko had explained it to him, her rich aunt – who had some kind of business relation to a company that produced the augmentation formula – knew of Kimiko’s self-image issues and had offered to supply her with the expensive formula not just for herself, but for her friends as well. As a result, all the “Girls of District D” – the nickname that Kimiko had given to their little group – were now slowly increasing their bust, much to Mike’s delight.

Mike thought that it must be nice to be rich enough that you can decide to do something like that on a whim, like giving expensive gifts to your niece. As it was, he desperately needed the money they were getting for testing the rejuvenation formula to keep up with his rent and other regular costs; neither living in the Tokyo Arcology nor attending the Tokyo Arcology International University was exactly cheap.

As a result of Kimiko’s aunt’s generosity, Mike was now living out one of his greatest fantasies and fetishes, and he had found that even with the marvel of undressing software being able to nearly perfectly simulate breast expansion, it was not even remotely close to a substitute for the real thing.

He looked lovingly at his girlfriend’s improved bust. She had already had a great figure, and the little bit of extra weight on top certainly didn’t do any harm. He softly rubbed her breasts through the towel, his fingers tweaking her sensitive nipples through the fabric. By now he had more than enough experience to not have to see them to find them.

Michelle moaned softly in response. “Don’t. We don’t have time, and they’ve been feeling a bit weird all morning.”

Mike stopped immediately, and frowned. “Weird? How exactly?”

Despite Professor Tamura’s assurances that taking rejuvenation formula and augmentation formula at the same time was perfectly safe, it was still a bit of an unknown given the experimental nature of the former. Mike knew enough about how genetic restructuring worked to know that they probably wouldn’t interfere, but still, you never knew.

“Just… tingly, I guess,” Michelle answered. “Like when your leg has fallen asleep, but a bit subtler and a lot more pleasurable.”

“Do you want to call a doctor?” he asked, sounding concerned.

She shrugged, and gently massaged the top of her breasts. “Nah, I can survive until the check-up this afternoon. Besides, it’s probably just because you’ve been abusing them so much,” she said, winking.

“I didn’t hear you complain last night,” he said wryly. “But you’re right, we shouldn’t assume that… Jesus wept!” he exclaimed as he noticed an unexpected movement beneath the towel.

Michelle withdrew her hands, and looked down at her chest, where Mike was staring. It was only slight, but to Mike’s expert eye it was unmistakable. He had played out similar virtual scenarios using his retinal implements often enough to recognize the real thing: her breasts were growing slowly, just barely fast enough to be noticeable.

“Mike, what’s…” she began, but her words were interrupted by a moan, and she suddenly felt unsteady. She quickly put a hand against the wall to prevent herself from collapsing.

Whether it was her sudden movement or the growth itself, Mike couldn’t tell, but the knot in the towel came loose, and it fluttered down to the floor, revealing her magnificent body in all its naked glory. There didn’t seem to be anything strange about her breasts, except for the almost imperceptible growth. Her pretty pink nipples were puffed up, and very hard.

Mike just stared slack-jawed at her rising chest, barely able to believe what he was seeing. His briefs became uncomfortably constrictive as his dick became erect as a result of the incredibly erotic sight.

Michelle got goose-bumps over her whole body, and with a final loud moan, collapsed to her knees. Then, it was over; the whole thing had lasted maybe twenty seconds, but it felt like a lifetime to the two of them.

After recovering her senses, Michelle got up from the floor, and sat on the bed. She carefully probed her breasts with her hands, but couldn’t find anything wrong. They felt and appeared perfectly fine, except at least a cup size larger than they were a minute before. They hung proud and firm from her chest, noticeably heavier.

“Are you alright? Is that normal?” Mike asked with a note of panic in his voice. Now that the excitement of seeing real breasts grow had passed, concern for his girlfriend had taken its place.

“Yes, and, I don’t know,” she replied breathlessly. “There doesn’t seem to be anything wrong, and the tingly feeling is gone.”

“Are you sure?”

“Yes. And, Mike,” she turned to look at him, blushing. “It felt good, really good. I nearly came.” Then her face got even redder. “Imagine that had happened in the transport tube! I would never live it down.”

“Well, I have to admit, it looked incredibly hot,” Mike replied with a lecherous grin. “But you’re definitely telling the doctors about this at the check-up today. And we’re both skipping the formulas this morning.”

By the time that Mike was on his way to class, concern had been replaced with excitement again. Other than the strange episode, Michelle did seem to be perfectly fine, and Mike just couldn’t get the sight of her expanding breasts out of his mind. He cursed himself for not having recorded the expansion with his implants; such an event was likely to be once in a lifetime.

He had already done some comparisons with the help of his undressing software. Michelle was now pretty much the same size that Rose had been originally, although the tall Brazilian had grown at least as much as Michelle in the past two weeks. Mike once again wondered how big Rose intended to go, and couldn’t keep himself from imagining her with breasts as big as Sayoko Tamura’s.

Since the only class that the five friends actually all shared together was Professor Tamura’s class on genetic restructuring, which was on Tuesdays, Mike didn’t meet with Michelle again until lunch. He had agreed to meet up with her and their friends in the cafeteria of the biology department.

Since Mike was a bit early, he decided to check the news, which he hadn’t done yet that day. He called up ECNN’s feed on his retinal implants, and his view of the real world was overlaid with the image of their busty Irish anchor.

“This is ECNN on-demand, I’m Mary O’Shea, and welcome to the news,” she began as always. Mike smiled as he saw that she had left a couple of buttons undone at the top of her blouse; he loved it when she did that.

“Our top story today is the unexpected announcement from China that they intend to genetically alter all new-born girls to be infertile. These girls would need to gain state approval to undo the defect with genetic restructuring in later life, making sure that the country’s strict birth policies can no longer be circumvented. In response, the Eurasian Union has threatened to apply sanctions against China and even said they would revoke the country’s membership if necessary, as these measures would be against the international restrictions on genetic engineering.”

The image changed to show Aaron Ekelund, the current head of the Eurasian Parliament.

“It is simply not acceptable for China, or any member state, to break international law,” he said. “We understand that the population problem in China is even bigger than in many other places, but taking away personal freedom simply isn’t the answer. This measure would go against human rights guaranteed by EAU laws, which China agreed to adhere to when they joined fifty years ago.”

Mike interrupted the program as he saw Michelle and Rose approach the table, and waved at them. “Hey there,” he called. “How was class this morning?”

“Pretty interesting,” Michelle said. Rose simply shrugged and sat down.

“And how about… you know? No further troubles?” he asked in a hushed voice.

Rose looked up from her lunch, surprised. “Why, did something happen?”

“No, it’s nothing,” Michelle said hurriedly. “And I’ve been fine, Mike. Thanks for asking though.”

Rose raised an eyebrow, but didn’t press the matter as Michelle obviously didn’t want to talk about it.

Konnichi-wa, Double-Ds!” Kimiko shouted across the cafeteria, causing Mike to groan. She jumped her way in between the tables to join them, followed in a much calmer fashion by Maaya.

Kimiko gave Mike a quick look-over. “That’s the same shirt again, Mike! Don’t tell me you stayed with Michelle again last night? The two of you should just move in with each other already!”

Mike laughed. “Don’t exaggerate, Kimiko. I’m not there that often.”

“I don’t know,” Michelle joked. “It would save money… and we could get a bigger bed.”

“Hah!” Kimiko yelled excitedly, pointing at Michelle. “So you two are sleeping together! I knew it, I knew it!”

Mike tried to hide his face behind his hands. “And now so does the rest of the university. Thanks a lot, Kimiko.”

As Kimiko and Maaya sat down, Rose frowned at the shorter girl. “Maaya, are you wearing heels or platforms or something?” she asked.

Maaya looked confused. “No… why would I wear heels to university? You know I don’t like walking on those things. Why do you ask?”

“Probably nothing,” Rose said. “Just my imagination.”

“Anyway, that’s not what’s important right now,” Kimiko said before Maaya could find out what Rose meant, removing something from her bag and putting it on the table. “Do you know what this is?”

“It’s a bra,” Rose said, pointing out the obvious.

“It’s one of my padded bras! I don’t need it anymore; I’m now a full, natural A cup! I’m thinking of burning it ritually to celebrate.”

She thrust her chest out proudly. Much to Kimiko’s disappointment, she had been the slowest to start developing since they had begun taking the augmentation formula. She wanted to be bigger so badly, but even Maaya was growing faster; the half-Japanese, half-Chinese girl had already nearly reached Michelle’s original size, which Mike had to admit looked spectacular on her small frame.

“And how about you guys?” Kimiko asked. “Any progress, Maaya?”

The diminutive girl pulled her shirt tight across her chest, showing the outline of her now respectable breasts. “I had to buy new bras yesterday, none of my old ones fit right anymore,” she said softly. “But I’ve still got a little way to go… I don’t want to spend too much on intermediate sizes.”

“Wow, you’re really coming along aren’t you?” Michelle said. “It looks great, right Mike?”

Mike could only nod silently. Still some way to go, she said? For a tiny girl like her, she was going to end up proportionally huge.

“How about you, Rose?” Kimiko continued. “Well, I don’t really need to ask, do I?”

She was right; Rose’s breasts were nearly the size of grapefruits now and there was no way she could hide them under that tight sleeveless top. Nor was she trying, really; with the shirt’s low cut, an impressive amount of cleavage was on display.

“Coming along nicely,” she said. “It shouldn’t be too long before I reach my target.”

Mike couldn’t help but feel a twinge of disappointment; with Rose’s tall and voluptuous figure, she was the only one in their group who could’ve gone for really huge and pulled it off without looking out of proportion. But it seemed she wouldn’t even reach Professor Tamura’s size if, as she said, she was nearly done.

“The only thing that’s driving me nuts is this damn horniness,” Rose sighed. “I don’t know which of the formulas is responsible, but it’s really distracting.”

“How to you think I feel,” Mike joked, “surrounded by four growing girls like you? It’s every hot-blooded male’s fantasy.”

“Hello? Lesbian, remember?” Rose pointed out. “And at least you have an outlet for your frustrations” – she gestured towards Michelle – “whereas I’m consigned to manual labour.”

Yeah, and talk like this really makes things easier, Mike thought sarcastically, though he didn’t say it. It was simultaneously great and hugely frustrating that the girls would include him whenever they discussed topics of sexuality. But Rose did have a point; if she was as much of a tit-girl as Mike suspected, the growth of the other girls would excite her just as much as it did Mike.

“Okay, and rounding out the pack, pun intended, Michelle?” Kimiko asked. “Any changes?”

Michelle looked away, embarrassed. “Not much to report,” she said. “Same as before.” She had deliberately worn a baggy shirt that morning so the results of what had happened weren’t obvious.

“That’s no fun!” Kimiko said. “We want to see!” And before Michelle could stop her, Kimiko lurched across the table and made a grab for Michelle’s tits.

As her hands made contact, Kimiko’s eyes grew wide. “What the hell? These are huge! You didn’t have those yesterday.”

With the secret revealed, Michelle had no choice but to relay the story of what happened that morning, although Mike noticed that she left out some details like the near-orgasm.

“And afterwards they felt completely normal, except bigger,” she finished. “I don’t know what to make of it.”

“That’s so unfair,” Kimiko said, slamming her hand on the table. “Why couldn’t that have happened to me? It sounds so cool!”

“I don’t know, Michelle,” Rose said, sounding concerned. “It sounds serious. You definitely need to tell the doctors.”

“Of course I will,” Michelle said. “And speaking of which, I think we’d better go if we want to be on time.”

The health centre was part of the Tokyo Arcology International University Hospital, and most students would be mainly familiar with it from the mandatory yearly health checks that the university imposed on all students and faculty members.

The health centre could also be used for cheap consultation if a student had any medical problems, but that didn’t happen very often. In an age where everyone was genetically engineered to have a strong immune system and no birth defects, good health was the norm. The most likely reason for visiting the health centre was as a result of injury or other external afflictions, not disease. It was a testament to the health obsession of the Japanese that the TAIU still enforced yearly full medical checks; most people just monitored their biometric chip regularly and only sought medical help if it indicated anything wrong.

Unfortunately, these breakthroughs in medical science had been a large contributing factor to the planet’s overpopulation. It’s great that everyone gets to live a long and healthy life, but if you don’t decrease the birth rate accordingly, the result is inevitably a massive population explosion. And ironically, instead of decreasing birth rates, the opposite had actually happened initially; thanks to the near total elimination of sexually transmitted diseases nobody worried about safe sex anymore, and while birth control pills had a virtually one hundred percent success rate you did need to remember to take them.

It was no surprise then that many countries, including Japan, had adopted laws to make birth control medication a mandatory part of both male and female diets starting from puberty unless they had explicitly decided to have a child. Some nations had even instituted policies that strongly discouraged anyone under a certain age – usually between thirty and forty – from having children. Additionally, starting from an early age children all around the world were indoctrinated by parents, teachers and PSAs to avoid pregnancy.

Yet with all those measures accidents still happened and the innate drive for reproduction is a hard one to suppress. As a result, the earth’s population was still growing, and it was therefore no surprise that some countries like China were considering taking even more drastic steps, even if those measures would be frowned upon by the international community. The opposition to the rejuvenation process being developed by the Madihi Fountain of Youth Labs stemmed from a similar source, since people were afraid that enabling even longer lifespans would only make a bad situation worse.

Although the health centre was hardly ever needed by regular students, since Mike and the girls were test subjects of an experimental drug they were asked to visit it for check-ups on a weekly basis, in addition to checking their biometric chip readings daily for any abnormalities. It was this check-up that they went to on Thursdays after lunch.

It was near the end of the check-up, and Michelle was sitting inside a medical scanner, waiting for it to complete its job. The device was a small, round chamber just barely big enough for a single person. She sat on the small stool in the middle wearing only her lacy green panties and one of those flimsy paper hospital gowns, watching as the blue light swept across her body, showing the scanning beam’s progress.

When the beam switched off, she heard the voice of Doctor Omiya, one of the two medical specialists that performed the check-ups, through the scanner’s speaker. “Please take off the gown, Miss Meyer, and stand up,” he said in Japanese; since Michelle had grown up in Tokyo she spoke fluent Japanese and always used it unless Mike, Rose or any other foreigners were around.

Michelle did as the doctor said, and hung the paper gown on the designated hook on the wall of the scanner. She slipped off her panties and hung them up too, and stood spread-eagled in the centre, as she knew she was supposed to. Unconsciously, she glanced down at her exposed chest, which seemed so large now compared to just a week ago when she was in this machine last.

The stool she had been sitting on retracted into the floor, while simultaneously two foam panels emerged from the walls from in front and behind her. The panels closed around her, deforming to match her body shape. They encased her completely from the neck down in a tight, form-fitting mould.

Michelle shivered involuntarily as they touched her. The panels were covered with a gel to ensure proper contact, and it was kind of cold. She felt her nipples harden and goose-bumps form on her skin.

Why did she have to be so horny today? She squirmed at the pleasurable slippery and snug feeling as the material closed around her pussy and contacted her clit, and she felt herself get moist. It took a lot of restraint not to grind her pussy into the panel surface, but she knew she had to stay still for the final deep-scan that the sensors behind the foam would perform.

She imagined what the scanner had to be like for Mike, and chuckled inwardly as she imagined the shape of his hard cock moulding into the foam. However, thinking of Mike’s dick didn’t exactly help Michelle pull herself together; rather it only deepened the need she felt.

The pleasurable feeling rose as the electrostatic tickle of the deep-scan field passed through her body. But, just as soon as it had begun the feeling ended, and the foam panels retracted back into the wall. Michelle bit her lower lip in disappointment, and tried to compose herself. Letting the doctor and nurse see her arousal would be too embarrassing.

As the panels withdrew, Michelle could briefly see her own outline in them before they started to revert to their normal flat state. The deep depressions that her newly-enlarged breasts had made were especially eye-catching, and two small holes in the centre of each betrayed just how hard her nipples were.

She was left standing in the scanner, covered in the contact gel, all shiny and wet. She moved her hands over her hips, stomach and up to her breasts, enjoying the slippery feeling; she made a mental note to get some massage oils for Mike to play with. Then she remembered she was being watched and quickly returned her arms to her side.

As the final step of the procedure, the scanner sprayed her with a gentle mist. The mist crystalized the gel on contact, causing it to fall off of her as dust, leaving her completely dry except for the dampness between her legs. She quickly pulled her panties back on before the doctor could notice it, followed by the hospital gown.

The scanner opened up, and she walked back out into the examination room where Doctor Omiya and a nurse were waiting for her.

“Excellent, Miss Meyer,” the doctor said. He was a surly looking man with short hair that was starting to turn grey around his temples. He had a pleasant enough bedside manner, but Michelle still didn’t really like him. “All we need now is a blood sample; sit down here, please,” he said, gesturing at another chair.

Michelle sat down and held out her arm while the nurse prepared the needle and cleaned a patch of skin. Michelle didn’t know if she was imagining it, but it looked like the young nurse was giving Michelle’s chest some envious glances.

The doctor seemed to have noticed it too. “I don’t know about the rejuvenation formula,” he joked as he sat down opposite her and prepared to take the sample, “but that breast augmentation formula seems to be working wonders for you. Don’t you agree, Nurse Ogawa?”

Embarrassed, the nurse quickly averted her eyes, and silently gave the doctor the needle.

“Actually, Doctor,” Michelle began as he punctured the artery in her arm. “I’ve been meaning to ask you about that. This morning, I had a little incident…”

Not long after, the five friends walked out of the health centre, having each completed their individual check-ups.

“So, what did Omiya say?” Mike asked Michelle. He was understandably anxious to know if she was alright.

“He said it was nothing to be worried about,” Michelle replied, looking relieved. “It was probably a hormonal release that triggered the formula due to the, um, recent change in my sex life.”

Kimiko let out a barely repressed snigger, while Rose merely rolled her eyes, and Maaya looked embarrassed on Michelle’s behalf.

“Apparently,” Michelle continued, “that kind of thing can happen when you’re using breast augmentation. He said he’ll double check it, but he didn’t seem concerned.”

“That’s good to hear,” Mike sighed. “They told me something similar.”

Michelle looked confused. “Wait, did you ask them about what happened to me as well?”

“Actually, no…” he replied, and glanced at the others. “It was something different. I’ll tell you about it later.”

“Well, I for one am glad it wasn’t anything bad,” Rose said. “For our own sakes as well as Michelle’s, because if something bad was happening to her, it could also happen to us.”

“Which means I need to find someone to have sex with so my tits will grow too,” Kimiko said, punching a fist into the air in determination.

“Wh…what are you saying?” Maaya said, looking even more embarrassed.

“Geez, lighten up everybody,” Kimiko said, frowning as she saw the shocked looks the others gave her. “I’m joking! Anyway, let’s go, I have another class this afternoon.”

“And I am free to live a life of leisure,” Mike said, putting his hands behind his head. “I’ll probably just check out some vids on the net.”

Michelle frowned. “Didn’t your professor say you should start seriously thinking about thesis topics?”

“I don’t feel like it now,” he shrugged. “I can do it later.” Truth be told, he desperately wanted an opportunity to relieve himself; now that he knew the swelling in his genitals wasn’t a problem, he had a pressing urge that needed attending. It was too bad Michelle didn’t have the afternoon off too.

Michelle just shook her head at his display of laziness. “Well, don’t come crying to me about your workload in a few months,” she said, only half-joking.

As they split up, Rose suddenly spoke up. “Oh, I almost forgot,” she said. “I wanted to watch a movie later tonight. Anyone want to join?”

“What movie?” Maaya asked.

“Not another boring one from the stone age, is it?” Kimiko added.

“Actually, it’s Eye for Danger. It’s a thriller from the mid-21st century. I think you’d like it.”

Kimiko pulled a face. “I don’t think so. Besides, I’m going swimming tonight.”

“And I’m hitting the gym,” Mike said. “Sorry, Rose. I wouldn’t mind seeing it, but not tonight.”

“I can’t make it either,” Michelle said, looking genuinely sorry. “I have a paper to finish. Maybe some other time?”

“Just great,” Rose sighed. “I guess I’ll watch it alone.”

“I’ll join you,” Maaya said unexpectedly; as far as Mike knew, Maaya and Rose never hung out together without the others. Rose was Michelle’s friend, and Maaya was Kimiko’s, and they rarely interacted when it wasn’t all four of them.

“That’s great,” Rose said, a bit surprised as well. “Let’s say we’ll meet at eight, then?”

A few hours later, after the results of the check-ups had been processed, a virtual meeting was underway between Doctor Bassir, head of the rejuvenation program at Madihi Labs in Casablanca and Professor Tamura. Also joining them were Doctor Omiya and his colleague from the health centre, Doctor Tanaka, who were charged with performing the check-ups.

The virtual meeting was being conducted using their retinal implants, allowing all four of them to perceive the meeting as if it was taking place with all of them in the same, white, featureless room. In fact, the two medical doctors were at the health centre, Professor Tamura was in her office, and Doctor Bassir was in Casablanca.

The meeting had been underway for some time, and as it progressed, it quickly turned from a discussion to an argument.

“I think we should tell them about the combined effect,” Tamura implored. Her virtual image had stood up and was leaning on the table, which had the side-effect of putting her large breasts prominently on display. “I was the one who told them it was safe to use both formulas at the same time; I’d feel responsible if anything more serious happens.”

“What exactly do you think we should tell them?” Doctor Bassir asked in his heavy accent. “Miss Meyer’s experience may have been unexpected, but it is not unheard of for people to have strong reactions to breast augmentation formula. At this point we cannot rule out ordinary causes such as increased hormonal activity; we don’t know if the rejuvenation formula is responsible.”

“But we don’t know that it isn’t, either,” Tamura said. “Wouldn’t it be best to err on the side of caution and take them off the formulas for now?”

“And then there’s that other girl, Maaya Chung,” Doctor Omiya said, leaning back in his chair. “According to the data from the scan she is almost four centimetres taller than she was last week.”

“Not even regular height augmentation formula can work that fast,” Doctor Tanaka added. “And I can’t even theorise how either of the formulas could cause something like that.”

“Have you considered the possibility that she is taking height augmentation without our knowledge?” Bassir asked.

“Of course, but we double-checked the blood work and found no evidence to support that theory,” Tanaka answered. “The only restructuring enzymes we found were ours and those from the breast augmentation. Besides, it’s not like she could purchase something like that without it being listed on her medical file, unless she was obtaining it illegally.”

“And why didn’t you tell her what was happening?” asked a bewildered Tamura. “Surely they have a right to know what’s going on with their own bodies.”

“We wanted to tell her about the change,” Omiya said. “However, since we couldn’t even speculate on the cause we decided that we should consult with you first.”

Bassir folded his hands together. “It’s a good thing that you did; telling her while we don’t understand what happened would serve only to incite panic in the subjects.”

“I don’t understand why she didn’t notice it herself,” Professor Tamura said. “We asked them to check their biometric chip every day.”

“I sincerely doubt the girl was even looking at that number,” Omiya said. “It’s not something you expect to change, after all. For the same reason, bio-chip software also isn’t programmed to alert the user of such a change, because nobody thought it could happen.”

“I see,” Tamura said. “But I still say we should take them off the formulas until we know more!”

“You are letting your personal feelings get the better of you, Professor,” Bassir reprimanded her. “This is science, and we need experimental data to draw conclusions. If we want to further develop our formula we need to understand what is happening to the subjects, and for that we need them to continue ingesting both formulas as normal. This will also improve our chances of discovering what is happening to them and fix the problem. Besides, at this point there is no evidence that these effects pose a health risk to the subjects.”

Tamura glared at him, but she did not contradict her former mentor.

“Personally, it’s the boy that concerns me the most,” Tanaka said. “It seems he experienced a slight tissue growth in his penis. And unlike the girls he isn’t taking additional medication at all, as far as we’re aware.”

Night fell over the Tokyo Arcology. For most of its one hundred million inhabitants that was noticeable only by the change in hallway lighting levels and the images taken by cameras on the arcology’s superstructure, shown by holographic screens that acted as fake windows.

An urban legend told of an arcology – which one depended on who was telling the story – which had, unknown to its inhabitants, increased the length of a day to twenty five hours. By using false images for the holographic screens they were supposedly able to keep everyone fooled for over a month.

Of course, the story was apocryphal; while rooms with real windows were at a premium they did still exist, and there were also people who went outside, and it would take only one person to notice and tell everyone else. Not to mention that anyone who contacted anyone on the outside or used the net – so, basically everyone – would immediately notice they were out of sync with the rest of the world.

For Mike, Thursday night meant going to the gym, something which he had done since coming to Tokyo. Back in England he’d preferred to go jogging outside, but jogging in the arcology hallways didn’t appeal to him very much, not least of which because of the crowds which were omnipresent in an arcology, and any places where he could exercise outside were too far away.

Those masses of people were also his least favourite part of going to the gym. The place was nearly always full regardless of what time of day you went there, and you had to reserve time slots on pretty much all exercise equipment otherwise you’d never be able to use them. And while he did like ogling babes in tight spandex doing exercises, it didn’t outweigh the disadvantages for him.

Fortunately, ever since he had gotten to know Rose, he had managed to solve that problem. One of Rose’s ex-girlfriends, whom she was still friends with, was the daughter of the owner of a big gym. It turned out that Rose had managed to arrange for Kimiko to be able to use the gym’s pool after closing hours on Thursday, the only day in the week the place closed early, at nine in the evening.

After some persuasion, Rose had asked her ex to let Mike use the gym at that time too, so he had switched from the TAIU gym – which was free for students – to that one. The owners did make him pay a membership fee, but the ability to exercise away from the crowds was more than worth it to him.

So every week he went to this gym, occasionally joined by Kimiko whenever she wanted to do some laps in the pool. They would head over there together and meet up again afterwards when going home; since Mike didn’t use the pool he rarely saw Kimiko on the inside.

Mike had wondered whether it was useful at all to continue working out now that they had started taking the rejuvenation formula. If the results were even half of what he was expecting then there would be little point, but when he had brought this up with the scientists they had urged him not to stop; they believed it would be a good way to keep track of his improvements in addition to the scans. And truth be told, Mike had to admit that he was curious to see if his routine would get easier.

Today however it didn’t seem likely that he would find out. Try as he might be simply could not concentrate on his exercises. The source of this distraction was between his legs; not only did the swelling make his shorts feel uncomfortable, but despite an extended wanking session this afternoon he was still feeling horny.

After an uncomfortable time spent crushing his balls against the saddle of a cycling machine he decided to give up, even though he wasn’t even halfway through his normal workout. There was simply no way he was getting anything useful done under these circumstances.

What he really wanted to do was swing by Michelle’s place and put their mutual growth to the test; between the swelling of his dick and her growth spurt from this morning he was sure they could have some awesome breast sex now, something which they had attempted previously during the last two weeks but she had not yet really been big enough for.

But unfortunately, he couldn’t. He knew Michelle had to get that paper finished and if he showed up on her doorstep there was no way either of them was working. He didn’t want to distract her, no matter how strong his own needs. So it seemed there was nothing for it; he would be jerking off again.

Wanting to tell Kimiko not to wait for him after she finished since he was leaving early, he walked into the gym’s large swimming pool. To his surprise he found the lights in the room slightly dimmed. The large holographic fake window covering the far wall wasn’t much help either, since it was night and thick curtains of rain were pouring down from the sky. Only the occasional flash of lightning showed the room in a stark contrast.

“Kimiko?” he called as he walked towards the pool. “Are you in here?”

He wondered if perhaps she had gone home early too, though if she had he didn’t know why she wouldn’t have at least sent him a message. However, he noticed that the surface of the Olympic-sized swimming pool was not quite still. Someone had been in there recently, so maybe she had just gone to the lavatory or something? He called her name again.

He walked along the edge of the water when he suddenly saw some movement from the corner of his eyes. He turned around and as if on cue a flash of lightning illuminated Kimiko’s silhouette. She was standing silently near the entrance of the changing rooms with a strange, almost predatory look on her face.

Despite the strangeness of the situation Mike couldn’t help but admire Kimiko’s figure as she stood there in her navy-blue one-piece swimsuit, dripping wet. Kimiko may not have had much of a chest before, but she had always been very fit and had killer legs. Even her black hair, tied back in a ponytail, looked alluring, soaking wet as it was.

Several years ago, Kimiko had been a very promising up-and-coming swimmer and had very nearly made the Japanese Olympic swimming team. Though she had eventually chosen her education over an athletic career and didn’t swim competitively anymore, she still had the lean and trim body of a professional athlete, while managing to have enough curves to not look boyish.

Now, with the addition of even a small amount of boobs, she was turning into a real knockout. If, as Mike theorised, she really was going for that lofty goal of double Ds or – Mike’s heart skipped a beat as he thought it – even larger, she would be the ultimate combination of slim and stacked.

But that glint in her eyes meant nothing good; it could only mean mischief was in store. She began walking towards him, not saying a word, slowly and deliberately crossing her legs in front of each other with each step, swaying her hips.

Mike swallowed hard as he watched her approach. Surely she couldn’t be thinking what he thought she was thinking? And if she was, would he be able to stop her? He couldn’t deny the signals his nether regions were sending him at the sight of the cute Japanese girl bearing down on him. But Michelle… he could never betray her. His horniness felt like a cloud hanging over his mind, preventing him from thinking clearly.

Kimiko was now close enough that he could smell her need; or was he simply imaging that, wishing that it were so? She looked at him seductively, and put her hands on his chest.

“Kimiko, I don’t…” he began, but then she caught him by surprise as she pushed him hard. Unceremoniously he fell backwards into the cool water of the pool.

Spluttering and splashing he resurfaced. “Jesus wept, Kimiko,” he coughed. “What was that for?” But when he saw Kimiko doubled over with laughter on the side of the pool, he couldn’t help but laugh himself as well.

“That was awesome,” she said in between laughing fits. “I should’ve recorded that; the look on your face was priceless.”

“Yeah, yeah, very funny,” he said with feigned sarcasm as he climbed back out of the pool. “Damn, now my gym clothes are all wet.” He began to pull off his soggy shirt, which was clinging uncomfortably to his body.

Kimiko wolf-whistled, and looked him over appreciatively. “Not bad, Mike. Those workouts must be doing something; Michelle’s a lucky girl.”

He walked up to her, feeling his arousal return. “Wait… was that your intention all along? To get me to take my shirt off?”

“Drat, you’ve uncovered my dastardly scheme,” she laughed, a playful glint in her eye.

“You are quite the mastermind,” he said, trying to keep her distracted as he made a grab for her arms in an attempt to return the favour and throw her in the pool this time. Unfortunately for him, she had anticipated that and side-stepped him. Her sudden movement made him spin around, disoriented, and despite his attempts to recover he lost his balance and landed on his back on the tile floor, fortunately not too hard.

He made to sit up, but before he could manage it Kimiko pushed him back and sat on his stomach. “Bad Mike,” she said jauntily. “You shouldn’t throw innocent girls into the pool.”

“Innocent, my arse,” Mike said, rolling his eyes. “Could you please get off me?”

But Kimiko didn’t move. “You don’t know how hard it’s been on me,” she pouted. “I’ve had a goddamn crush on you since you joined Tamura’s class, but you only had eyes for Rose and Michelle. And I know why.” She cupped her small new endowments. “Tits,” she sighed. “I could never compete because they had them and I didn’t. But that’s going to change now.”

Mike didn’t really know what to make of this. He did know that Kimiko’s sensual weight on top of him and his view of her lithe body from this angle was causing his own body to respond, whether he wanted to or not. “Look, Kimiko, Michelle and I are…”

“I know that,” she interrupted him. “And I’ve accepted that, and I’m happy for you. I’m not the type to hold a grudge against one of my best friends because she got what I wanted. I got over it, and you’re a good friend, and that’s enough. But still… a girl has needs, you know. And ignoring them isn’t always easy, some days more than others.”

Mike was getting uncomfortably aware of the growing heat in his loins. He loved Michelle dearly, but having a cute girl confess she wants to do him was still incredibly hot, especially when she was sitting on top of him in nothing but a tight one-piece, holding her expanding chest.

Wait, that wasn’t right. Her expanding chest? Mike’s eyes grew wide as for the second time that day he was a direct witness to his greatest fantasy becoming reality. Slowly but surely, Kimiko’s chest began to inflate inside her swimsuit.

Kimiko, still oblivious to her own situation, did become aware of some expansion Mike was doing on his own as his hard cock poked her in the back. She reached behind her and lightly stroked it through the wet fabric of his shorts. “Looks like I’m not the only one who has needs,” she purred teasingly. Then, she let out a brief moan. “Damn, Tamura sure wasn’t kidding with her claims of increased libido. I feel like I’m on fire.”

Mike, remembering Michelle’s growth episode, had his own suspicions about what was causing her heightened arousal. “Kimiko, your breasts are…” he managed to grunt. He needed to get her attention away from his dick; if she continued stroking it like that he wouldn’t be responsible for his actions.

She stopped her ministrations and looked down. “Oh wow,” she said, her eyes widening. “It’s happening to me too! Oh god, yes!” She began rubbing her breasts through her tightening swimsuit. By now, they had reached a full B cup, two smooth bumps the size of small oranges underneath the blue fabric. “Is this what it felt like for Michelle? God, it’s incredible.”

A small voice in the back of his head was telling Mike that he had to get out of there before things got out of hand, but slight as she was, it was hard to move with Kimiko on top of him, and a much larger part of him – the part that was ruled by his dick – didn’t want to ever take his eyes off of what was happening in front of him.

Then, unexpectedly, Kimiko leaned forward, grabbed Mike’s wrists and put his hands on her breasts, while simultaneously she began grinding her ass against his crotch. It took Mike so completely by surprise that he didn’t even resist.

“Feel them grow,” Kimiko moaned. “Feel the breasts that I’m growing for you.”

Mike couldn’t stop himself; he began fondling her tits. They felt wonderfully soft, and were nearly the size Michelle had been before this morning’s growth spurt, although it was hard to judge while they were constricted by the increasingly tight swimsuit. The growth created a strange sensation of shifting fabric beneath his palms, very slight but just enough to be noticeable.

Kimiko by now was lost in rapture. Her face was contorted in pure pleasure, and it wasn’t surprising considering she had already been growing longer than Michelle had been. “Fuck this,” she moaned in Japanese, her mind so far lost in the sensations that she couldn’t manage to speak English anymore. “I can’t hold out anymore.”

She shifted her position – causing him to lose his grasp on her breasts – sitting on his legs so that she had Mike’s raging erection in front of her, and pulled his shorts down. His dick jumped out of its prison, hitting Mike in the stomach before bouncing back up. Mike was too far gone himself to really register it, but it stood up just over twenty centimetres, definitely larger than when he had first noticed the swelling.

Kimiko rubbed one hand up and down Mike’s shaft, and with the other pulled the crotch area of her swimsuit to the side, revealing a patch of black hair, a swollen labia and an erect clit. She raised herself slightly, positioning her cunt over his rock-hard dick.

“Kimiko, stop…” Mike managed to utter, somehow. “Michelle…”

“Isn’t here,” Kimiko finished for him, and continued stroking him with one hand as she hovered above him. “Tell me you truly don’t want this, don’t need this like I do, and I’ll stop,” she said. Fortunately, Mike’s Japanese was good enough to get the gist of what she said.

Mike wasn’t sure if she would really stop, though, no matter what he said. But it didn’t matter; the battle between reason and desire had been fought in his mind, and his overwhelming horniness had caused desire to win. He knew he’d regret it later, but right now he simply couldn’t stop anymore.

Taking his silence as approval, Kimiko lowered herself, and enveloped Mike in the hot, tight wetness of her insides. She moaned even louder as she continued her descent. The overpowering feelings from her expanding chest and Mike’s large cock filling her up had her thundering through her first orgasm in no time at all, and she didn’t show any signs of slowing down. Mike had no choice but to go along for the ride.

Also not slowing down were her breasts. Two grapefruits were now being compressed inside her swimsuit, the material getting stretched to capacity, and they weren’t done yet. Mike was doing his utmost to keep his eyes open so he wouldn’t miss one second of it.

Mike groaned as he felt Kimiko’s pussy convulse in yet another orgasm. The sounds the Japanese girl was making had long since left any semblance of meaning behind; they were pure primeval moans and squeals as her mind was experiencing white-out from bliss overload. Her exclamations of pleasure in that sweet voice only served to further fuel his own arousal.

Mike noticed her swimsuit was reaching its limits as her breasts passed the size of cantaloupes. “Kimiko, your suit…” he managed to say, but she was too far gone to hear him.

But even she couldn’t ignore the growing pain as the straps of her suit began to dig into her shoulders. The sturdy material of her professional swimsuit had reached its stretching limit, but it was too high quality to start tearing anytime soon, and it started to seriously constrict Kimiko’s breathing.

Frantically, she managed to wriggle her fingers underneath the shoulder bands and succeeded in pulling them off. Relieved, she removed her arms from the holes and once again focused her attention to pumping up and down Mike’s dick, her orgasms now so frequent that they appeared to blur together.

Her movements meant that the swimsuit, now no longer held up by anything, dropped down to her waist, revealing her still growing chest. The massive globes were larger than volleyballs, their true size only becoming apparent now that they were free of their prison.

Mike just couldn’t believe it. He was used to a lot thanks to porn and undressing software, but this was different, this was real… and they were huge! As they continued beyond basketball size, Sayoko Tamura officially lost the title of the most-endowed Asian that Mike had ever met. They hung proud and firm on her chest, topped by large dark pink nipples, looking absolutely incredible on her slim body. They bounced heavily every time Kimiko came down on his cock, slapping against her stomach.

They were now easily big enough that he could effortlessly reach them from his position lying down, and he began kneading them roughly with his hands. He mashed the vast spheres of flesh together, pinching and pulling the nipples on occasion. They felt incredible to his touch, massive, wonderful, almost perfect.

Finally, the sight of her amazing chest and the sensations of her hot pussy milking his cock sent him over the edge, and he came like a freight train, pumping his sperm deep inside her, unsure whether the whiteness he was seeing was more lightning outside or just his brain shorting out.

With a final loud moan which echoed through the empty swimming pool, Kimiko herself experienced one last powerful orgasm brought on by Mike’s groping of her tits and his hot stream inside her, and, finally spent, she collapsed onto Mike’s chest has his slowly deflating cock slipped out of her. Mike held her gently, feeling the weight of her new boobs on his chest, unable to think, unable to do anything.

He stroked her wet hair, and glanced at her breasts, which appeared to have stopped just short of the watermelon mark. “Don’t tell me that’s the size you chose,” he chuckled softly.

She shook her head. “No way,” she whispered, exhausted. “This is much more than I planned. I’ve always dreamed of having them this big, though. It’s incredible. And so were you; that was pleasure beyond anything I have ever felt in my life.”

Then, slowly, inevitably, reality came back, and the realisation of what they had just done sunk in with both of them.

“That was pretty good,” Maaya said as the credits rolled on Rose’s big wall screen. Rose always insisted on using a screen, with regular 2D images, when watching old movies; in her view using holographic enhancements or retinal implants just spoiled the experience.

“I’m glad you liked it,” Rose said. The tall Latino girl was lounging back on her couch wearing a loose fitting t-shirt and shorts that she had changed into after getting home, with her bare feet up on the table.

“I did,” Maaya said. “It’s not really a genre that I normally go for, but I definitely enjoyed watching it. And the music’s amazing!”

Rose smiled. “That’s why I think Kimiko would like this movie too; she loves old music.”

“Yeah, but I’m not sure she’d like this style, though. Why do you care what she thinks of this stuff anyway?”

Rose shrugged. “It’s just annoying that she’s dismissing them without even trying to watch one. But at this point, I don’t know if there’s anything she’d actually agree to see. I mean, what else could I try? Labyrinth or something? That’s just too cheesy.”

“I think I’ve seen that one, actually,” Maaya laughed. “Yeah, it’s cheesy, but it does have its attractions, although that probably doesn’t apply to you.”

“Oh god, David Bowie’s balls,” Rose groaned. “I really don’t see how anyone can like a guy’s thing. There’s just nothing appealing about it.”

“I’m sure many girls wouldn’t understand why you find another girl’s vagina attractive,” Maaya countered.

“I guess,” Rose shrugged. She got up, and collected their glasses from the table. “Want another drink?”

“Just some water, thanks,” Maaya replied. She watched Rose walk into the kitchen and admired her tall, curvaceous form from behind. Maaya wasn’t a lesbian, but she would describe herself as bisexual, and Rose’s magnificent body would make even the most conservative straight girl question herself. Rose just effortlessly oozed sexuality no matter what she did. It was more than simple envy or admiration that Maaya felt for her friend, though she’d never dared to admit it even to herself.

When the movie finished, the screen reverted to showing the contents of Rose’s extensive library. With Rose in the kitchen, Maaya began to randomly flick through it, looking for titles that looked interesting or familiar.

“Wow, you have a lot of old movies,” Maaya called to Rose. “I’ve not seen most of these, though I’ve heard of a few.” She continued browsing the library which consisted mostly of 20th and 21st century titles, stopping occasionally to read the description of an interesting looking movie, until one of the movie posters caught her eye. “What’s this one? Attack of the 50 F.T. woman? What does that even mean?”

Rose came back with the drinks, her – apparently braless – expanded breasts jostling around under her shirt as she walked. “It’s pronounced ‘feet’,” she said.

Maaya looked back at the film poster shown on screen, confused. “But she only has two feet; she’s just very big.”

Rose laughed as she sat down again. “It’s an old measurement unit, silly. It’s the imperial system; don’t you know your history? One foot is thirty centimetres, so fifty feet is about fifteen metres.”

“Right,” Maaya said. “I remember that. Weren’t metres invented yet when this movie was made?”

“Of course they were. Metric’s been around for centuries before then, but the USA – where this movie was made – didn’t switch to it fully until the early 22nd century. They still used inches, feet, yards, miles and whatever before that.”

“Why didn’t they switch before? Isn’t metric much easier?”

“Beats me,” Rose shrugged. “I guess it depends on what you’re used to.”

“I suppose”, Maaya said. She sipped her water, and smacked her lips. “I’ve got really dry lips; you wouldn’t happen to have any lip balm or something?”

“Oh, sure,” Rose said. “It’s on the bedside table in the bedroom. Do you want me to get it for you?”

“Nah, I’ll find it.” She got up and walked into Rose’s bedroom.

After a few moments, Rose heard an exclamation coming from her room. “Oh wow, Rose! This is amazing!” Maaya shouted.

“What is?” Rose asked. Not knowing what her friend was talking about, she got up and hurried into the room. Inside, she found Maaya spread out on her bed, grinning broadly.

“Your bed,” the short girl said. “It’s huge!”

Rose laughed, and sat down on the side of the bed. “That’s what’s amazing? You made me think something strange was happening or something.”

“How long is this thing?” Maaya asked unabated. “I can’t reach both ends simultaneously even if I stretch my arms above my head.”

“It’s two metres thirty,” Rose said. “I like having plenty of space.”

“God, I could get lost in here. It must be great being that tall.”

“Not that great. I mean, I have to go out of my way to find clothes that fit, I have to duck for doorways and low ceilings, and a bed this size isn’t cheap either.”

“I’d love to be taller though,” Maaya said softly. “There’s no way being two metres ten like you is worse than my own puny one forty-five. If I could afford it, I’d get height augmentation in a heartbeat.”

“It does have its advantages,” Rose agreed. “No one tries to intimidate me, I don’t get squeezed into a corner if it’s crowded in the transport tubes, and I can keep annoying boys that don’t get the hint that I’m not interested away easily.”

“You’re just so lucky,” Maaya sighed. “You’ve got everything. You’re tall, absolutely gorgeous, strong and smart… unlike me.”

Rose gave Maaya a surprised look. “Three out of four isn’t bad either, Maaya.”

“I’m not strong, or gorgeous,” Maaya said in an almost inaudible whisper.

“Yes you are,” Rose said forcefully. “You just need a bit more confidence. And honestly, I think that’s been improving, perhaps thanks to the formulas. You’re carrying yourself more proudly lately; for example, I wouldn’t have expected you to agree to see the movie without Kimiko before.”

Maaya didn’t seem convinced. “If you say so.”

“I’m not kidding,” Rose said. “I even thought you looked a bit taller during lunch today, which is probably just because you’re not acting so shy.”

“Taller? I wish! I’ve been the same size since I was sixteen,” she said, sounding a bit bitter.

“At least some parts of you are growing again,” Rose reached towards Maaya, who was still lying down, and tried to cup a breast, but she pulled back from the touch.

Rose quickly withdrew her hand. “I’m sorry,” she said. “That was too forward; I shouldn’t have…”

“No, it’s okay,” Maaya said, blushing furiously. “They’ve just been a bit sensitive lately, but you can touch them if you want.”

Rose reached out again and gently caressed the soft hill atop Maaya’s chest through the fabric of her lilac blouse, taking it slowly so she wouldn’t scare her off.

Maaya squirmed involuntarily. She didn’t know if Rose was just being playful or had more in mind, and she didn’t really know which of those she wanted to be true, either. She gasped as shivers ran through her entire body, accompanied by a pleasant tingle.

“I know what you mean about the sensitivity,” Rose said. “I really should’ve worn a bra under this; my nipples keep brushing against the shirt and it’s driving me nuts.”

“Then take it off,” Maaya said suddenly, turning red, scarcely believing what she was saying. She felt unusually bold and frisky tonight.

“What?” Rose asked, surprised.

“I’d like to see your big boobs,” Maaya whispered, surprised by her own courage.

Rose simply shrugged, and pulled the t-shirt over her head. Her grapefruit-sized breasts hung heavily on her chest, sagging just a little. They were topped by large, dark areola and nipples, which clearly betrayed Rose’s excitement.

Then, to Maaya’s surprise, Rose stood up and pulled off her shorts too, revealing wide hips and a clean-shaven pussy. Now completely nude, she posed seductively, hands on her hips. “Well, what do you think?”

“Oh wow…” Maaya said softly. She sat up as Rose sat down on the bed again, and reached out to touch the Brazilian’s breasts. Her hand looked so tiny compared to that perfect pair; they were a perfect complement to Rose’s narrow waist, flat stomach and wide hips. In Maaya’s eyes, she was a veritable dark-skinned goddess, unattainable, untouchable… until now. Maaya had never realized before how much she wanted this.

She moved her small hand over the slope of Rose’s vast breasts, lightly brushing the nipples, so this time it was Rose’s turn to shiver with pleasure. Then she put her hand under one of them and lifted it up, marvelling at the weight. She nearly regretted not picking a larger final size for the formula. She’d only gone for a C cup; no matter what Kimiko said, Maaya just didn’t think she could pull off a larger size on her small body. She vehemently wished she were taller so she could have a chest like Rose’s.

“Tell me, Maaya,” Rose said with a playful look in her eyes. “Have you ever been with a girl before?”

“Twice,” Maaya said, not meeting Rose’s eyes. “But that was a few years ago. And neither of them was nearly as beautiful as you.”

“Then it’s time you got a refresher,” Rose said simply as she pushed Maaya back on the bed.

Suddenly, Maaya’s world was obscured by dark curls as Rose leaned over her. Soft, full lips pressed against hers, and Maaya instinctively reacted, parting her lips to admit Rose’s tongue. She closed her eyes and enjoyed the kiss, which lasted a long time.

When their mouths finally parted again, Rose repositioned herself so now her breasts were directly above Maaya’s head. Maaya watched breathlessly as they swung pendulously above her, and she couldn’t suppress an excited squeal when Rose lowered herself, burying Maaya’s head in soft breast-flesh.

Maaya felt like she was in heaven. She greedily devoured those amazing tits which were almost as big as her head. She mashed them against her face with her hands, and sucked on those large, perfect nipples. Rose moaned in response, and put one hand to work fondling Maaya’s breasts through her shirt, keeping herself propped up with the other.

Maaya, lost inside Rose’s cleavage, barely even noticed how the tingling feeling intensified over her whole body and her chest in particular. Rose on the other hand was a bit more observant and realised something was happening.

She lifted herself off Maaya – causing some protests – and quickly spotted what was wrong. “Maaya, your breasts are bigger,” she said, her voice a mixture of excitement and concern.

Maaya propped herself up on her elbows, and looked down. “They are? But how…”

She didn’t finish the sentence as a huge wave of pleasure surged through her body. As it did, her chest swelled in front of the eyes of a disbelieving Rose. They were rapidly filling up the space in her blouse, pulling the fabric tight and causing gaps to show between the buttons. When they stopped, they had reached the size of large oranges.

Maaya looked at Rose, her face flushed. “That was amazing,” she said, panting. She examined her new chest. “Looks like I may have overshot the C mark,” she added sheepishly.

“Yeah,” Rose said breathlessly. “It looks great, though. Do you think this was the same thing that happened to Michelle?”

“Could be… damn, I’m still feeling all tingly. You still have me beat, though.” She eyed Rose hungrily. “And I don’t recall saying you should stop.”

Rose stood up from the bed, and brushed a hand through her hair. “But don’t you think we should get a doctor? This can’t be normal,” she said, though her face betrayed the internal conflict; she didn’t really want to stop either.

“Later,” Maaya said simply, also standing up. “Right now there are more important things.”

She walked up to Rose and pressed her against the wall, grabbing Rose’s large bare breasts. Standing on tip-toe and pulling Rose down, she proceeded to kiss the tall girl again. Rose capitulated easily, and returned the kiss even more passionately than before.

The kiss and their mutual caresses almost turned frantic as their excitement rose. Maaya just couldn’t get over how turned on she was; Rose’s smell, her big breasts, her soft body, her full lips against Maaya’s, it was driving her wild in a way that she’d never thought possible.

It didn’t take long for the tingling feeling to intensify again, and this time Maaya was aware of it. However, she didn’t stop kissing, or said anything. Instead, she welcomed it, mentally urging her breasts to grow again. At that moment she didn’t care how impractical it would be, she just wanted to be bigger.

She pressed her body against Rose as she felt her blouse tighten again. The sound of tearing was audible – the seams around her armpits were giving up! A button snapped open, and Maaya’s excitement grew; she wanted to burst out of her shirt if she could.

But something was strange; the tingling wasn’t limited to her breasts. Still locked in the kiss, Maaya’s pants got tighter, and her sleeves rose up her arms. Her mind was getting overloaded with pleasure from the sensations, almost to the exclusion of everything else.

Maintaining the kiss became easier and easier, as she didn’t have to reach quite as high anymore. She was no longer standing on tip-toe, her feet now flat on the ground. It couldn’t be happening, but clearly it was: she was gaining height, getting taller like she’d always wanted!

She didn’t want Rose to know yet, she wanted to keep this wonderful feeling to herself. She wanted it to be a surprise to her beautiful partner, and she was also a bit afraid that Rose would force her to stop and call a doctor if she noticed. Deep down she did acknowledge that growing like this couldn’t be normal, but she couldn’t pass this up.

To keep Rose distracted, she moved one of her hands away from Rose’s tits and down to the Brazilian’s already dripping wet cunt. She pushed a finger inside, then another, and with her thumb began to manipulate her clit. Rose moaned in response, fuelling her fervour. Rose also moved a hand to Maaya’s crotch, stroking her pussy through her increasingly tight jeans.

That in combination with the feelings of the growth was too much. The pleasure rose to a crescendo, and Maaya was caught in the throws of an orgasm pretty soon. It nearly overwhelmed her; she had to break the kiss and simply held on to Rose.

As her orgasm continued to build, Maaya’s body surged upwards. Hiding it from Rose was impossible now; loud ripping and tearing noises came from her blouse and jeans as Maaya’s body became too big for them to hold. Another two buttons of her blouse let go as they were unable to stand up against a torso and breasts that were now much bigger than they were designed for.

And Maaya wasn’t the only one. As a result of Maaya’s manipulations of her clit, Rose joined her in an orgasm of her own, shrieking loudly and covering Maaya’s hand, still buried in her pussy, in her sticky fluids. The tingling feeling overcame her as well, and her breasts slowly grew as the two girls collapsed to the floor together.

Soon – too soon – the feelings subsided. Maaya, exhausted, sat down on Rose’s bed, and Rose leaned against the wall; both of them glistening with sweat, smelling of sex and with their hair all messy.

“What the hell just happened?” Rose asked, breathing heavily, her now nearly volleyball sized breasts heaving on her chest.

Maaya looked up, excited. “I think I got taller,” she said, elated. “I actually got taller! Isn’t it wonderful? It felt so good; I didn’t want it to stop!” She stared disbelievingly at her clothes, which had partially ripped along the seams. Thanks to the missing buttons, her bra was visible underneath her blouse. Her breasts, now somewhere between oranges and grapefruits in size, were bulging out of the completely ineffectual garment. The remains of her jeans were uncomfortably tight around her hips; she’d probably need scissors to get them off.

Rose looked concerned. “But, are you alright? This can’t be normal; no one grows that fast.”

“Oh, Rose,” Maaya exclaimed, and she got up from the bed and walked towards Rose, noticing happily that the top of her head was now above Rose’s breasts. “I appreciate your concern, but I’m fine, really. This is my dream; let’s not spoil it by worrying. We can find out what’s going on tomorrow; for now I just want to let it happen, and enjoy it with you.”

After Mike and Kimiko had gotten dressed – which posed some problems for the latter as her clothing wasn’t exactly suited for her new physique – the two of them discussed what to do. They were both very distressed about what they’d done, and neither really understood how they could’ve been so stupid as to let it happen; they weren’t teenagers anymore, so they thought they should’ve been able to exercise better judgement regardless of how horny they felt.

One thing was clear to both of them: they couldn’t keep this a secret. They’d have to tell Michelle. Kimiko had pleaded to come with him, desperate to tell her side of the story to Michelle, but Mike thought it would be better if he broke the news alone.

So it was that despite his intentions not to visit her today, he now stood in front of her door ringing the bell, deeply nervous about how she would react, hoping against hope that he could salvage the situation.

When Michelle opened the door, already wearing her nightshirt, she looked understandably surprised. “Mike? I thought you weren’t going to…” She stopped as she noticed his expression. “What’s the matter?”

An ashen-faced Mike walked into her room, and sat down on the couch. Staring into deep space, not meeting her eyes, he told his story. “Michelle, I… I don’t know how to tell you this. My god, I’m so sorry.” He was on the verge of tears.

She sat down next to him and put a hand on his knee, frowning. “What is it, Mike? You’re scaring me.”

“I was in the gym, and I wanted to tell Kimiko I was leaving,” he said, talking quickly, almost rambling. “But she threw me in the pool, and my shirt was wet so I took it off, and then she was on top of me, and she was touching me, and I just couldn’t think straight! I wanted to resist, but I couldn’t, and we… we…”

“You had sex with Kimiko!?” Michelle said, aghast, and she withdrew her hand.

Mike just nodded, still not looking at her. “We didn’t mean for it to happen. But we were both so horny, and then her breasts were growing, and…”

Michelle cut him off. “Wait, her breasts were growing? Like mine?”

Mike looked at Michelle, and noticed for the first time since he came in that her chest looked bigger than it had that afternoon. Underneath her nightshirt, they appeared to be the size of cantaloupes. “It happened again? And I swear my dick’s larger too… What’s going on here, Michelle?”

Involuntarily, Michelle briefly glanced at Mike’s crotch when he said that. “Something’s definitely wrong with these damn formulas,” she said angrily. “I wish we never agreed to Tamura’s proposal! We should’ve known better than to take two formulas at once. Our bodies shouldn’t react like this, and who knows where this’ll lead? What if we get cancer or die as a result or something? And now you’re sleeping with Kimiko… everything’s just going wrong now!”

“No!” Mike nearly shouted. “I didn’t sleep with her! I just… I wouldn’t cheat on you, you know that. I love you, Michelle, I swear! I feel horrible, and wish I could just go back and undo it, but I can’t, and… and now all I can think about is how I’m going to lose you because I’m such an idiot. I don’t want to lose you! Kimiko was in tears too because she thinks she’s ruined her friendship with you. We were stupid, it was wrong, but please, believe me, we didn’t mean to…”

Michelle sighed. “It’s that stupid formula’s fault as well, isn’t it? I’ve been feeling so horny all evening, and then when my breasts grew again it got even worse… I’ve been masturbating the whole time, wishing you were here, rather than working on that paper like I should’ve. If Kimiko and you felt like I did, then I suppose it’s not so strange that when the opportunity arose…”

“Look, Michelle,” Mike said. “I’m not looking for excuses. Maybe we were affected by the formula, but we still shouldn’t have… I should’ve been strong enough to stop her, stop myself, dammit!”

“I know, Mike,” she said softly, still sounding hurt. “I just need time to think. I appreciate that you told me, and I know you didn’t mean to hurt me, but this isn’t something I can just shrug off. There’s a part of me that just wants to rip your pants off and make you make it up to me that way – maybe that’s the formula’s work too – but I just can’t.”

“Just say the word,” Mike said, pleading. “I’ll do anything; just give me another chance, please. I’d never forgive myself if I ruined this.”

“I don’t want to lose you either,” Michelle said. “But I need some time to process this, okay? Just go home, Mike, and tomorrow we’ll talk to Tamura and put a stop to this. Then, we’ll see where we stand.”

Feeling quite dejected but also cautiously hopeful and glad that she hadn’t just told him it was over – which she had every right to in his opinion – he left her apartment. All he could think about when she showed him out was how he could make it up to her. He was too distracted even to notice that Michelle, who was normally slightly shorter than him, was ever so slightly taller than usual.

Sometime after midnight, Maaya and Rose lay naked in bed together, exhausted but content. They had continued for longer than Maaya thought she could’ve lasted, and both of them had reached extremes of pleasure that they had previously not known existed.

Maaya lay awake, snuggled up against a sleeping Rose. She could feel the other girl’s rhythmic breaths as those magnificent breasts pushed against her. Both Rose and Maaya had experienced the tingling feeling again, and Maaya’s breasts now looked proportionally like grapefruits, while Rose had surpassed volleyball proportions.

How big they actually were depended on how big the rest of her was, and that was a bit hard to say; Maaya had kind of lost track of how tall she’d grown exactly. It was hard to pay attention to anything when you’re engaged in a sex marathon with – in Maaya’s eyes – the most beautiful girl who ever lived.

Although she was tired, Maaya didn’t want to fall asleep. It still seemed incredible that her fantasy of growing bigger had finally come true, and she was afraid that if she fell asleep she’d wake up the next morning to find it was just a dream.

But even if that didn’t happen, the next morning would mean having to face the question of how it happened. As much as she had loved the experience, a small part of her had to admit it wasn’t exactly normal. They would have to seek medical help and figure out what happened. But for now, she didn’t care; no matter what happened next she would never regret this wonderful night with Rose, and the fulfilment of one of her greatest wishes.

Curious to see how she compared to Rose now, she stretched herself out in bed. Rose was definitely still the taller of the two, but Maaya thought that Rose herself had also grown a bit, though it was hard to be sure how much. However, Maaya estimated that she was around two metres tall now, which meant she was taller than Michelle, she thought excitedly.

But then she noticed something that didn’t make sense. When she stretched out like this, her feet escaped from under the covers, and she could see that Rose’s legs also clearly extended beyond the foot of the bed. Rose had said the bed was two metres thirty, and Maaya’s head wasn’t far from the headboard.

Maaya’s heart skipped a beat; both she and Rose had to be even taller than she’d thought. It was hard to get a clear look, and she didn’t want to get up to confirm it since she didn’t want to disturb Rose, but she was definitely longer than the bed. At a rough guess, the amount of distance she could extend her feet over the edge meant she had to be over two fifty, and Rose was even taller!

Contentedly, she finally fell asleep. In her dreams, she and Rose continued making love and continued growing taller, until they put even the woman from that movie poster to shame.