Wren felt another yawn coming on as she lay with her head laid in her hands. Her eyelids were fighting to close. Briefly she tried to stifle the wide yawn but then decided that it was almost the end if the day and she didn't care anymore about remaining "attentive" to Mr. Reiker's lecture the development of the human body during puberty. It was sleep inducing listening to her. Wren's own endowments had developed decently during her puberty, leaving her with small D cups and a nicely rounded butt. Shed been much more fortunate then her best friend, sitting across from her. Still, as she looked at the massive rack covering the desk of Ella Anders she felt a pang of jealousy.

Soon, the bell rang and Wren picked herself and her things up and headed towards the door.

'Hey, wait up!" Danielle raced over to her.

"Hm?" Wren mumbled and looked over at Danielle, her eyes wide and excited. "What's up, Danielle?" She smiled at her friend, not trying to seem rude.

"You know that...experiment I've been working on?" Wren nodded hazily.

"Kinda, yeah."

"Well..." She suddenly got very nervous, her glasses falling to the bridge of her nose as she looked down at her fiddling hands. "Um...I wanted...you to...um...be the first to try it." Wren smirked a bit.

"Alright then. Your place, right?" Danielle nodded enthusiastically. "Well, let's go then." Wren gave another quick yawn as they headed towards the door of the school. Unfortunately, the couldn't avoid who happened to be hanging out just on the other side.

"Hey there matchstick," Ella greeted the red headed Wren, using her nickname. The blonde bimbo approached, parting from her group and approaching the two friends being sure that her H cups bounced noticeably when she walked.

"I'm not a matchstick anymore, Ella, these are D's," she replied, irritated and not in the mood to deal with the bully.

"Compared to me? Yeah you're right, maybe more like a broomstick with a few knots on it," Ella answered back. "And you....it's no wonder no one notices you ever. If you turn sideways you disappear!" the blonde referred to Danielle's lacking figure.

Danielle went red and crossed her arms across her chest. Ella got up close to her, pressing her humongous chest up against Danielle's flat board. Danielle didn't dare to back up, and just stared nervously down Ella's massive cleavage, her shirt hiding little to the imagination.

"Like them, two by four?" She pressed them a bit harder against her. "Yeah, I bet you wish you could have them, huh?" Danielle's blush intensified. She suddenly looked up with a slight ferocity in her eyes.

"What if I said I could?" She said firmly. Ella backed up, a look of shock on her face. It then evolved into a slight smile, then a chuckle, then a long, cackling laugh.

"Oh, oh that was a GOOD one, two by four. You keep dreaming and maybe, just maybe you may get as big as your friend flat front over there." She waved, still laughing hard as she walked away, leaving Danielle to fume behind her.

Wren scowled at Ella's back as the buxom blonde slowly made her way over towards her locker where the rest of her girl pack waited for her return. Ella made a point of making her hips sway as much as possible, most likely meant as one last kick in the teeth to the two friends. Not wanting to stick around for any further taunting directed at herself or Danielle, Wren grabbed her friend's arm and lead her down the school hallway towards their lockers.

"I wouldn't mind at all if that witch stepped outside and had the misfortune of being crushed under a falling house..." Wren muttered once they reached their lockers. She opened hers and pulled out the necessities that she'd need to take home, however, she paused after thinking about something Danielle had said. "What was that threat you made to Ella? You said you could have boobs that size if you wanted? Don't tell me you're thinking about getting fake boobs, are you?"

Danielle instantly went five shades of pink, each darker than the last. "N-n-n...no!" She stammered in embarrassment. "Its...uh...you know that...experiment...I was talking about earlier?" Wren nodded. "Well...um...I'll tell you when we get to my place." Danielle glanced down the hall and saw a distant, buxom figure. They headed down the hall in the opposite direction, and out the doors, walking to Danielle's as it was only a little ways from school. "I've been working on it for a while." Danielle stirred up conversation.

"I...well, its a little embarrassing, really. But...it'll...um..." She lead Wren up her stairs and into her house, then down to the basement. The basement was littered with papers, clothes, and pet toys. There were dressers propped against the walls, all of them being filled with photo albums, old story books and thick, encyclopedia -sized books. The thing that really stuck out in the cramped downstairs room were the three fold out tables, each with different sorts of scientific items; beakers, test tubes, strange colored liquids, cups, eye droppers, anything you might find in a typical laboratory -- well, one with no budget, anyway.

Danielle smiled and picked up a few test tubes filled with liquid. "Alright, wanna test this out for me?"

Wren eyed the vial of fluid with one eyebrow raised and a unconvinced look on her face after she swept her vision across the homemade lab that looked like the imaginary setup of a kid playing mad scientist. Slowly she took one of the test tubes from her friend and examined the blue liquid inside. She shook it a little. It was a fairly thick fluid and didn't move much inside the small glass tube.

"So.....you were working on a sort of formula or something that would make....um...make a girl's boobs grow bigger?" the redhead asked, her voice betraying disbelief. "Do you think it will actually work? I mean I don't want to end up going to the ER and having to explain that I drank some strange cocktail my friend cooked up in her secret lab." Yet, even as she questioned the formula, Wren couldn't help but imagine what this could mean if it did work. She was already a decent rack size and certainly drew looks from the guys whenever she donned anything with a low cut on it, but what if she could get bigger? And not just a little bigger, a lot bigger? Wren pictured herself with beach ball sized breasts, but quickly pushed away that mental image. She didn't want to get carried away with this especially when there was no guarantees that it would even work.

Danielle took one of the test tubes from Wren and popped the cork. She hesitated as well.

"I've done a lot of research and such...apparently this stuff exists, I didn't exactly 'discover' it. But scientists don't want it getting out there. Ya know, because of plastic surgery being a big business and all? This stuff gets out there, and a bunch of people lose their jobs." She smelled the aroma and jolted her head back at the stench. "Whew, its gotten a bit...ripe since I actually made it. But...it should only make them grow a little, if I made it right. Barely even a cup size bigger, if that. With only one vial full, too, I made three for now, but I could easily make more now that I practiced a bit. But...I'm...scared to try it. I'm afraid it would...mess up." She fiddled with the vial between her fingers a bit. "I mean, it wouldn't make you grow horns or give you food poisoning or anything, its just...a size thing, I guess. The only thing you can really mess up is how much it actually makes you grow." She smiled, and handed the vial to Wren.

"But I'm POSITIVE I made it right. You'll be fine! Please, just...try it for me?"

"Well....." Wren paused and took the uncorked vial from her, shrugging her shoulders. ".....if you say it'll work....and won't like turn me into a frog or something....I guess bottoms up, then." Before her nerves could act up on her again, she raised the vial of blue fluid to her lips and slowly poured it into her mouth. It tasted very sweet, like liquid sugar, but with a tingly aftertaste that reminded her of soda. Finishing the entire vial, Wren licked her lips and placed the vial back on the rack with the two still full ones. "Wow. Even if that stuff doesn't work you could make a mint on it if you sold it as drink. That's tasty!"

“Well, its good to know the taste and smell don't add up!" Danielle giggled. Her face then became filled with curiosity. "So...how does it feel?"

"It feels tingly," Wren admitted with a giggle as she felt the fluid fizzing inside her stomach then the feeling quickly dissipated. Expectantly, she watched her chest expecting her D cups to maybe blossom to full E's. Nothing happened, though. She gently grabbed her breasts and massaged them thinking that it might stimulate them to grow, but there were no results. "Well....um....that was a bit disappointing," the redhead said finally, letting her hands fall to her sides as she shrugged. "I think you might need to....*gurgle*.." Wren frowned and looked back down as a strange sensation built in her bosom. "It feels like...like there's something..." A moment later her shirt was pushed out a sold inch as her breasts swelled up. "It's working....Dani. it's working!" She said excitedly as she watched her boobs slowly gurgle and fill up her shirt. Her bra was creaking and the cups were cutting into her flesh as it started to overflow them. Seams were popping along the sides of her shirt. Just when it seemed it would rip, the growth subsided. "Oh wow....that was great!!"

"Yes! Success!" Danielle threw her arms in the air then hopped a bit up and down. "Alright then..." She grabbed a test tube from the rack and popped the cork. "I'm so excited!" she downed the liquid, quickly grabbing the third test tube. She paused, thinking for a second. "I should wait...I mean...results may vary, I think." She glanced over at Wren and saw her glorious swelled breasts, barely any bigger, but still looked so large. "But...I don't have much to lose, I guess. Bottom's up!" She popped the cork and downed the second vial of the thick and delicious blend and waited for the results to take hold. "Think of me...with breasts! Actual breasts! Boobs the size of yours maybe! The very thought of it..." She felt the fizzing in her stomach dissipate as she rubbed her boobs carefully.

Then she felt it, as the fizzing faded, she felt her breasts slowly gaining mass, stretching her loose white shirt and making it gradually more taut. "Yes!" The once flat chest of Danielle soon became admirable A-cups, then soon B-cups, the size of oranges. The growth slowed, then halted altogether, Danielle letting out a satisfied sigh. "I'll have to make some more. Complete success though! What do you think, Wren? Want anymore?" She looked up to see her friend.

Wren looked over her friend's newly grown in breasts and smiled excitedly. "They look great! Hmmm I'm not sure what more would do but...." She looked at her own modestly expanded chest them recalled Ella's size and immediately she made her decision. "Let's get another batch ready! I want mine as big as my head!" She screamed excitedly, squeezing her E cups until she gasped from the pleasant sensation.

"Calm down, Wren!" Danielle said with a big smile, her excitement almost meeting, if not exceeding her friend's. "Now, help me out, here. I gotta set up for it." Danielle turned to the desk and began to pull out various liquids, tablets and containers from the shelves behind the desk, her hands shaking slightly. "Oh man, you know...I never thought it would really work! You look up all that stuff on the internet, and you don't know what to believe! I mean, there's pills, magic bras, spell books. Obviously all scams. But I really had to dig for this formula. Been scanning the internet for months. They keep it REALLY well hidden. Good thing I found it though, right Wren?" She paused for a second, hearing an odd sound come from behind her.

"...Wren?"

Wren was looking down nervously at her D-cups as a loud gurgling sound persisted and seemed to be growing louder. The sound wasn't the only thing growing, though.

"Um Dani....I don't think your formula is done yet....my boobs are really tingling and....ooooohhh here they go!" She said half moaning as her breasts pushed out into her shirt, instantly bursting several seams along the sides of her shirt. Wren gasped as her bra cups started to dig into her swelling globes causing both discomfort and pleasure.

Wren leaned back against a table to brace herself. Slowly she reached up with one hand to try and feel her tender boobs butt was stopped when a sudden spurt of growth caused her to thrust her chest out and immediately cause a nice rip to appear on her shirt, transforming her subtle low cut into a very low cut. "Oh god it feels so good....wait they're....they're getting a bit too big don't you think?" She asked with concern. Her boobs responded with a loud groan as they swelled past F cup range and headed towards G's.

Danielle stared at Wren, speechless.

"But...b-b-but...I drank..." She recalled the dosage she had consumed and began to sweat. A sudden grumble begin to emanate from her chest. She slowly looked down, biting her lip, worried about what would await her eyes. Her fears confirmed, the clothing around her breasts began to tighten up more than before as her breasts puffed out to even bigger dimensions.

*Gulp*

Danielle continued to eye her chest, completely forgetting about Wren for the moment, her breasts barreling through C-cups at a higher rate than Wren. "Oh...oh God." She brought her hands up to boobs and touched them, only to throw her chin downwards, a gasp leaving her mouth as her body began to shake. "Mmmm..." She moaned quietly, but suddenly whipped her hands away from her body and put them to her sides, shaking her head. Her eyes widened as she saw the seams of her shirt begin to thin around her now D-cup breasts. Her panting increased as she leaned against the lab table, causing some ingredients to spill all over it. She took little notice and kept eying her billowing chest meat, her neckline plummeting and showing a more prominent cleavage.

"OH GOD, WREN, WHAT HAVE I DONE?" She suddenly looked over to Wren in sheer panic, finally coming to grips with the reality of the situation. She stuck her chest out in a sudden burst of pleasure, the growth nowhere near stopping as they began to look like large coconuts had been shoved down her shirt. The fabric groaned and began to tear slightly towards the bottom of her bust, the size and shape becoming more and more defined. Her nipples became more and more prominent through the fabric of her shirt, Danielle never bothering to wear a bra before because of her lack of flesh. She had an abundance now, and even though she lacked one, they seemed to be firm and perky all on their own, while still maintaining a unique softness somehow. "Wren...Wren, what should I do?"

Wren gaped in amazement as her friend's chest blossomed before her own eyes, swelling to sizes beyond what either of them had thought was possible with the serum. She tried to answer but could only stare dumbly as the situation escalated.

"Wow......um.....wow....." The redhead managed to say blankly. " she looked at her now G cups and wished that she could have taken a double dose too. "Well....I don't think you'll get too much larger....but your shirt isn't going to pull through I'd say," she managed to say at last. Wren watched holes appear in Dani's shirt now. Flesh eagerly pushed through the tears, widening them as her tits looked for further room to expand. "Just relax and enjoy it. Imagine how jealous Ella will be."

"Enjoy it? Wren, I'm getting-" A sudden rip made her yelp as she glanced down at her bust. A large hole tore right in the center of her shirt, revealing most of her cleavage. Her boobs now F-cups, roughly the size of cantaloupes, and still growing at full speed. 'Ella jealous? Of me? But...that's not why I did it...' Danielle thought to herself, tossing over the reasons of her expansion in her head. "I never wanted to be bigger than Ella, Wren..." She moaned again as the holes continued to broaden, the flesh of her boobs swelling out like rising dough. Not many threads remained as the shirt continuously fell apart around her now G-cup breasts. "I just...wanted them bigger...like yours, not this-OH!" She let out a surprised and passionate gasp as her shirt finally gave in her boobs pushing forward an inch from their confinement and bobbing up and down. Wren's jaw dropped as she watched Danielle's bosom jiggle up and down., shaking and jiggling for a full twenty seconds. They still persisted in growth, soon getting to the size of bowling balls.

"Jeez, they're...they're getting bigger than yours, Wren..." Danielle brought a tentative hand to her bosom, lightly touching the bare flesh of her breasts. Soon her other hand began to brush her skin, until she was prodding them, then massaging them. They were getting to medicine ball range, roughly I or J cups by now and the growth seemed to be receding. Danielle closed her eyes in deep concentration and pleasure, letting the feeling pour over her like Wren had suggested. "Mmmmhmmm..." She moaned quietly to herself, pressing her fingers into her flesh, her teeth digging into her bottom lip. Realizing what she was doing, her eyes flew open as she dropped her hands. She looked down slowly and saw her engorged gifts in front of her. She couldn't even see her feet.

Her eyes widened. "Oh, man..." She mumbled nervously. Observing them slightly with her hands again, now less out of pleasure and more out of curiosity, she studied how big her boobs had become. They seemed to reach all the way down to the bottom of her ribcage, and the tops seemed to stop at the base of her neck, still with no bra supporting it whatsoever. "No..." She waved her hands a bit in panic, feeling them bob around much more, sending shivers down her spine. She stopped moving altogether. "Wren, this isn't right! These aren't normal! What will the girls in school say? They'll just think I went and got work done or something...like a desperate whore or something. This was a bad idea...a really bad one! Why did I even do this?" Danielle was starting to panic a bit shuffling through papers and ingredients.

Wren was only half listening to Danielle's panicked rambling as she sorted through the stacks of research papers, trying to find some way to reduce her current voluptuous predicament. The redhead was staring at Dani's now I cup breasts. They were mostly naked except for a few inadequate shreds of material that were hanging over them. Every frantic movement of her arms sent her boobs into a jiggling dance that seemed to be distracting Dani from her work, obviously not used to carrying around breasts of that size, or any size for that matter.

Not being used to having the smaller breasts, Wren felt a wave of jealousy welling up inside her. Briefly she felt guilty for it and tried to pack it back away into the back of her mind, but it refused to be quelled. She knew she should be happy for her friend. Dani had always wanted breasts and nature had taken that hope away from her. Now she had boobs that would turn every head of both genders in her direction and she wanted to throw that away. Wren suddenly worried that if Dani did make a reversal serum, she'd make her take it and reduce her back to her natural D's again. Glancing down at her enlarged H cups, Wren mentally planted her heel and decided that she'd never go back to her original size.

Then her eyes fell upon two more vials of the blue breast enhancer serum neatly sitting in a rack just off to the side of Dani, seemingly calling to the redhead. Wren went glassy eyed at the thought of how big she could get after downing both vials. Her conscious told her that it wouldn't right to do that to Dani and that it could be dangerous. She realized how crazed she was becoming over this breast expansion issue. Yet, the other half of her brain told the rational one to stuff it. With her mind made up, Wren made a dash for the rack and seized both vials of the formula. Before Dani could stop her or change her mind, she popped the corks off both and drank them both simultaneously

Dani glanced over and saw Wren gently place the two vials on the table.

'Wren...?" Wren put on an innocent face, feeling the tingle begin to take hold in her body. "Wren! Why the hell did you drink those?!" Wren didn't answer, lost in the haze of the pleasure coursing within her. "Ugh...those were failed, Wren! I put them aside because I messed them up! I don't know what they'll do!"

'What?!" Wren finally snapped back into reality and began to observe her body.

"Oh god......" Wren raised her hands quickly to her H-cups and held on. Her eyes widened when she felt her two lovely lady lumps gurgling and pushing out into her hands. "D-Do something!" she pleaded, panicking at the thought of them getting too large.

Wren's top, already under tremendous strain from her overexpanded boobs was now fighting a losing battle as they grew beyond it's capacity to hold back. Tit flesh started to overflow through the neck. The redhead groaned in pleasure from the feeling of her sensitive mounds being squashed by the shirt.

"W-what am I supposed to do?" Danielle began to fumble around on her lab desk, trying to find some kind of answer, something that would make things normal. But she didn't know. She had never planned far enough ahead for this. And now her friend's boobs were busting out of her shirt!

Danielle turned to face Wren only to see her expansion accelerating. Her shirt was tearing all over the place. The sides, the front, on the bottom, revealing both her flesh and the bra that was constantly being strained. The creaks and groans emitting from her clothing became more and more audible as her breasts reached the size of bowling balls.

"Dani..." Wren turned to look behind her. "I feel...something else..."

"I think....I think that formula of yours is heading South too......" Wren said, her voice easily showing her anxiousness as she carefully placed both palms on her round behind to see if she was right. The gurgling noise and sudden expansion of both butt cheeks confirmed it. "My ass is growing too!" She screamed in shock. Wren clenched her hands into her expanding rump in the same vain attempt to stop the growth that she'd applied to her breasts. The result was the same. All attempts to stop her butt from ballooning to the size of two small melons failed. Wren's shorts, tight before the growth, were now starting to look more like a pair of panties as her butt cheeks swelled out through the leg holes. Both girls heard the stretching noises of the material. "Oh God....it's not stopping...." she gasped, in pleasure but also in shock.

Her expansion upstairs hadn't let up yet either, though. Wren's attention was brought back to her boobs when a low grumbling noise built along with the sensation that something was filling up her two melons. The gurgling intensified until her breasts were visibly trembling. "Oh no.....please no no no!" She felt the growth building and said her last good byes to her bra. Wren placed her hands tightly on her boobs and braced for it.

The sudden wave of pleasure took hold of her as she arched her back and screamed in ecstasy. Her breasts shot forwards, having a huge growth spurt, causing them to speed through several cup sizes in just a second. Her shirt finally gave the rest of the way, becoming mere shreds off her body, as her bra still somehow struggled to contain her now J-cup breasts. They had swiftly became the size of medicine balls, and they were still rapidly expanding by the second.

"Oh...oh, God...Dani, this isn't good!" Danielle just ogled her in shock, amazement and fear. 'How big are they gonna get?' she thought. 'How badly did I fail with those experiments?' Wren could feel her shorts snaking more and more up her rump, revealing more and more of her billowing backside. "Dani...I can't take this...I think I'm gonna...gonna....gonna..." Her voice got higher with each repetition of the word. She felt another wave coming, her butt then began to tremble and groan as her breasts did before, and her boobs were soon repeating their tremble and gurgle routine, but it seemed even more intense this time, Wren needing to lean against the wall behind her to support herself as her legs buckled under all the endorphins rushing through her system. She held on tight to her boobs as she felt the intense rush fill both her sides. "Ah...ahhh...oh...UNNNNHHHH!"

Wren's hand were thrown away from her boobs when her J-cups suddenly ballooned out at least several more cup sizes to the point of almost being large enough for use on the beach. The growth was so sudden and explosive that she was jerked forwards, nearly falling over. By this point her bra had become little more than a skimpy bikini that was only managing to keep her nipples hidden from view. It didn't stand a chance against this new surge of expansion. Her bra was like a dam and the growth was the water, except in this case it was a damn made of sticks holding back the Great Lakes. Wren groaned as the straps cut into her shoulders and the cups had become engulfed as tit flesh spilled around them and the tortured straps.

"Too.....uhhhh.....big!" she screamed, desperately squashing her hands against her monstrous endowments. A second rumbling expansion blew her up to beach ball size. With a resounding PING, her bra snap broke and the piece of once useful lingerie became a black lace missile that rocketed across the room and smashed into a rack of beakers, causing the whole thing to fall to the floor. Broken glass scattered across the linoleum. Free from containment, her boobs jiggled violently, bouncing so hard that Wren barely managed to keep her footing. She found herself slowly tipping forwards from the increasing weight. "No stop growing!! STOP!! What the hell was I thinking!!! Don't you have a cure or something or.....UMPH!!!"

Her cries were replaced by a loud moan as growth surged to her ass. Grumbling, her butt filled up like two party balloons, roughly equal in size to them as well. Wren's panties were stretched so tightly that they no longer resembled any sort of adequate underwear. She felt a side of her panties give way and flushed in embarrassment. Luckily for her, her shorts were rapidly becoming a new pair of underwear and would eventually end up more like a thong as her butt expanded further. "Uhhh....uhhh.....MMMMM...." she gasped. It now looked like she'd stuffed two melons down the back of her pants, but with her shorts only managing to preserve modesty at this point, barely, it was very apparent that all that flesh was all her. The flexible gym shorts could only take so much growth. Eventually she heard strands popping and seams giving out as the material continued to hug her ass with increasingly uncomfortable tightness. "My butt.....ugh...it...won't....stop either.....my shorts....are going to.....” RIP! Wren yelped and covered herself with one hand when her shorts gave out, falling to the floor along with the remains of her panties that had been trapped inside them.

Wren fell to the floor-well, more on her boobs than the floor-and began panting as the expansion slowly dissipated. She was raised only slightly as her flesh flowed upwards and around, her ass and breasts giving their last feelings of expansion their goodbyes. She lied there, panting and heaving, sandwiched between two large mounds of uncovered flesh.

Danielle looked on, pushed over to the lab table. She gawked worriedly at her friend. "Wren...I..." She peered over and saw her friend's face buried in her cleavage, breathing slowing down a bit. "I'm sorry...I never meant for any of this to-"

She was cut off by her friend's laughter, slowly building up as she raised her head. She smiled at Danielle as she pushed herself off of her squishy, puffy mams.

"Oh man. Wait until Ella gets a load of THESE!"