Description: Alphys’ lab assistant is tired of serving his lazy gooner of a boss and has decided to test out his newest invention on his gullible boss before moving on to her girlfriend Undyne. Kinks: Brain Drain, Brainwashing, Mind Break, Humaned, Brain/Ear Fucking, Bimbofication, Bimbo, Latex, Penitration, Personaility Excretion (jinnkakuhaisetsu), Latex Drone, Monster Girls, Lesbian Correction, Corruption, Betrayal for Cock and Master/Slave, Cuckquean, non-con, Chapter 1: New Invention A few years had passed since the magical barrier had fallen. The monsters of the Underground were free to live with the humans in the realm above and things were going well. Humans and monsters got along pretty well all things considered. Peace had been achieved and everyone was free to pursue their hopes and dreams. Alphys in particular was free to binge watch new anime, and manga while her assistant did most of the generic lab work. Yes, Alphys had an assistant, she was entitled to research grants, but mostly spent them on anime figurines and junk food. The new peaceful age of human-monster cohabitation meant development could be slow, but it still had to happen. So, Alphys kept some spare cash to keep an assistant, Anders. He was some wizkid who responded to one of the ads she sent to the local colleges and he was a blessing. Not only was he a cutie, a slender boy with hentai guy blonde hair and smooth voice. He was much taller than Frisk, a good two and a half feet taller than Alphys. He got all the stuff on the high shelves for Alphys, and did most of the government required tinkering for her. Allowing her to focus on the important things like gooning in her office to the newest Evenicle. (which had even cuter anime girls!) However, today Alphys would be interrupted early… “Hey Alphys, I just finished something exciting you should like,” shouted Anders as he pounded on her office door, “ can I come in?” At the sudden knock, Alphys nearly fell out of her chair. Her clean-up towel fell to the ground as she sprung to attention, “Gimme a minute!” Alphys quickly slid her panties on while saving and exiting from Evenicle three (which she was definitely playing for the plot). Her long white lab coat was stained with sweat under her pits, which she realised wouldn’t do. Alphys quickly threw it under her desk, and grabbed a new one from the closet before answering the door. “Hehe su-sorry, Anders.” Muttered Alphys as she opened the door, “Why don’t you come in and take a seat.” “Not needed, boss. I just wanted to show you this little gizmo I invented!” Said Anders “Oooooh, lemmie see!” Alphys adjusted her little spectacles as Anders walked into the room and placed a rather large box on her desk. Then, he reached inside and pulled out a… collar? Granted it was very cute, a pink collar with a doily filigree around the top and bottom. With a little heart shaped tag to complete the anime look Undyne so desperately loved. “You made a cosplay collar?” “No it’s an enhancement collar, made to enhance higher brain function by focusing the mind.” responded Anders. “Then why does it look like something from Mew Mew Kissy Cutie? It looks just like the main character’s cat collar, minus the tag.” “I thought you’d like the design if it resembled something you know.” “Hmmmm, it does look very cute.” Said Alphys as she took the collar from Anders, “Did you do the stitching on this collar yourself because it is very professional, and the leather is very high quality. Where did you get it and-” “Ahem, cosplay creation tips later, boss.” “Ahhh, su-sorry! Peh-please gu… go on!” Sputtered Alphys, flustered at being called out in the middle of her nerd rant. “I wanted you to be the first to try this out. Since it is mostly based on your research and your account of what happens during the enhancement would be invaluable.” Continued Anders as he pulled a small remote from the box, “So are you willing?” “Of course! I’m happy to help my little assistant.” Said Alphys, she adored new doohickeys and she thought the collar was the cutest accessory. She opened the little twist lock at the back and wrapped it around her neck. The material stretched slightly to fit around Alphys but it was surprisingly comfy. “Should something be happening?” Asked Alphys, “I don’t feel any different?” “I just need to turn the collar on and the programing should do the rest.” Responded Anders with a smile. He leaned over and pressed down on her heart tag. Alphys heard a little click and then the heart began to glow bright pink. “Ooooo, very anime! I love the little neon glow effect you did.” Giggled Alphys, “so when is it going to-Hnnggghhh!” “Right about now,” responded Anders. “Is eh-it suh-supposed to bu-bu-be so, mmnnggghh!” “Moaning already, I expected it would take a lot longer before becoming pleasurable.” “Whu-what do yu-you mean by pleas-hnnggghh!” Alphys paused, her body shivered as her pussy throbbed and soaked her panties. She tried to reach down and cover the growing stain on her crotch but she couldn’t move. “Hnngggh, I cuh-cannssh mooooff!” sputtered Alphys. “Wow the collar works on you way faster than I calculated… I wonder if it’s faster due to your size?” Pondered Anders, scratching his chin as he watched Alphys writhe in pleasure. “Haaaannnggh, muh-make issssh-stooppss!” Cried Alphys. She tried to move, but her limbs felt stiff. It was like someone poured concrete into her joints, and her arms laid limply at her sides. “Whu-why can’t I move!?” She continued, looking at her assistant. Terrified and trembling as she watched his warm smile disappear, replaced by a cold stare. “Because you’ll stop the transformation otherwise, but don’t worry, you’ll be able to move after it finishes.” Responded Anders, “After all, I wouldn’t want my new slave to be paralysed.” “Su-su-swwaaave!” Drooled Alphys, “Bu-but why would dyuh-you du-do isssshh!” “Because I am tired of being your bitch boy.” “Hnggghh!” Alphys groaned as her assistant grabbed her face, squishing her cheeks as he forced her to look into his eyes. A grin grew across his lips as he watched Alphy’s jaw hang drooling and slack. “You’re a disgusting gooner, who spends all day watching trash anime and masturbating to shit hentai games.” Spat Anders, his voice a growl, “Do you have any idea how thin these walls are? I know you are not making mac and cheese.” “Ishhh nu-not shiiiit! Issshhh guuuudd-aaahhnn,” sputtered Alphys as her pussy’s throbbing melted her brain. “God, you’re getting your brains fried and you’re annoyed that I called your favourite anime shit?” Anders shook his head, disappointed, “You’re such a pathetic weeb, I’m going to enjoy seeing your brains traded for tit size.” “Whuuuussh!” cried Alphys. Anders couldn’t be serious, no technology could actually trade her brains for tit size. “Now stare into my eyes and let that I.Q drop into the negatives.” “Nuhhhoooo issshh dwwilll…. Issshh whu-wiiilll… duuuhhh!” Alphys’ tongue fell out of her mouth drooping off her chin as she looked into Anders’ eyes. Like beautiful blue swirling pools, she couldn’t look away from him. He was so captivating that Alphys didn’t even notice her clothes ripping apart at the seams. Her brand new lab coat and sweatpants bulged for a moment before falling at her feet in tatters. Her new tits were each the size of watermelons and distended over a foot from her body. They sagged covering most of her now tight tummy, which led down into a pair of extra wide hips. Alphys’ dump truck booty was now even larger, two mountains of soft yellow flesh that perfectly represented the most stuffed Brazilian booty Anders had ever seen. Her legs had thickened significantly, two fat jiggly thighs squished together as her body trembled. The changes felt so good that Alphys nearly passed out from being edged so hard. Her soft inner thighs were positively soaking with cunt juices that trickled down to her feet. She’d never felt better, and yet she couldn’t cum. No matter how hard she wanted to… “Hnngggh cuhh-cuummmssh, neeeesssh ccuuummss!” she whined, her voice sloppy. “You look perfect, slave, and I am honestly surprised. I didn’t think you had the brains to change so much, but this saves me a lot of time altering you further.” Said Anders as he let go of Alphys’ face. “Hnnggghh, thu-thaaaankies An-duuuurr, hee-heeh.” giggled Alphys, with a big spit slicked smile on her face. “Now, to make sure my will is the only thing in your empty little head.” Anders paused and pulled a big red button out of the box before continuing, “I am giving you a choice, Alphys.” Alphys nodded along, drooling like an idiot as she uttered, “Uhuu-huuunh!” “You can press this button in my hand and have all your brains back or…” Anders paused as he pulled down his sweat pants and out flopped his massive human cock, “You can shove that snout against my cock and huff the last of your brain away, making the change one hundred percent permanent, but you’ll be allowed to cum.” “Hnnggghh!” Drooled Alypys as she leaned forward, her eyes, giddy pink swirls of lust, fixated on his dick. Everything about his thick human member was perfect. The thick pulsating veins, the fat cock head covered with thick foreskin, and his thick girth. If Alphys could still properly think, then she would realise her hands wouldn’t be able to wrap around his girth. “Hurry up, Alpys.” teased Anders, folding his arms over his chest, “Your brain cells are slowly melting. Do you want to be my cumdumpster or-” “Coooowwwwk!” Drooled Alphys as she pressed her lips against Anders' thick tip. She hardly had to bend over to take Anders' tip into her mouth. Her tongue moved under his foreskin and she greedily lapped up his sweat, and sucked his thick pre-cum out of his urethra. “Guuuuunnkkkk!” “Ghuuuuaaannnkkk!” “Ghhhaaaaanngghhhkk!” Alphys let out choked groans as she took Anders' cock deeper into her throat. No cheap dildo or strap-on could compare to her master’s fat human dick. Its aroma permeated her entire being and seeped into her scrambled, pleasure broken brain. There were no thoughts left in her head, beyond gooning while she choked back her master’s godly cock. Every inch she took into her throat made Alphys feel a bit closer to cumming, to finally being pushed over the edge. “Such a greedy little cock pig. You’ll make a fine mook after I give you a little more training.” Spat Anders, a sadistic ear to ear grin on her face as he grabbed the back of Alyphys’ head. “Ghuuuanankk!” gurgled Alphys as she felt Anders’ meat swell in her throat. “I hope you enjoy the orgasm you traded your brains for, slave.” Grunted Anders, “Ahhhh, who am I kidding, a perverted mook like you will love every second!” “Guuunngghhh!” moaned Alphys the swirls of pink in her eyes congealed together to form little hearts in her pupils as her master blasted his seed directly into her stomach. She felt like a girl right out of Dropout (her favourite doujinshi), her pussy squirting a jet of sticky cunt honey over her thighs as she swallowed over a gallon of her new master’s thick ball cream. He was such a stud, filling her to the brim before pulling his meat out of her throat. “Not bad, I was expecting your suck skills to be much worse, pet.” “Uhhhnnggghh!” drooled Alphys as the strands of sticky sperm and spit dripped off her chin. She just stood there, expression blank and drooling as Anders wiped his cum stained cock off on her face. “But don’t just stand there dumb and drooling.” Chuckled Anders as he pulled his meat off of Alphys’ face, leaving more strands of cum and spit over her. “You’ve still got a lot more work to do, mook.” Continued Anders as he sat in her old gaming chair, “Now hop up, and let's make up for lost time.” “Duuuhhhmm, yeessh siiirrssh!” Drooled Alphys, her eyes lit up at her master’s orders and she scrambled to his feet. Alphys nearly fell over as she struggled to balance with her brand new tits. Alphys had to grab onto the table, but luckily Anders wasn’t too far from her. She struggled at first to climb up onto his lap, but the ever present sight of his massive throbbing cock pulled a strength from Alphys she didn’t know she had. Soon Alphys was on his lap, her new massive ass cheeks smothered most of his meat, but still part of his shaft poked from between her ass. “What are you waiting for, slave?” Asked Anders, “Start putting that worthless weeb pussy to good use.” “Hnngggh, yu-yes.” moaned Alphys, her breath heavy as she stood on Anders thighs. His cock tip was positioned just below her drooling pussy, pressing against her inner thighs. She could feel his meat pulse as she slowly moved her cheeks down on his tip. “Hnngghhhh, suuuh-bu-bu-BIG!” shouted Alphys as she felt Anders grab her hips and slam her little body down on his dick. “You were taking too long, pet so I decided to give you a hand.” Said Anders, “Aren’t I nice?” “Hnngggaaaa-hhnngghhaaa!” screamed Alphys as she felt Anders' fat meat burst into her womb. His massive meat made a belly bulge so large Alphys could feel it poking the underside of her massive tits. Alphys didn’t thick her body could stretch so much, but her soaking folds accepted every inch Anders thrust into her body. “Is this your first time with a real cock?” asked Anders. “He-he, yeeeeessh,” giggled Alphys. The pleasure of being skewered like a cheap Japanese ona-hole was incredible, but her master’s words pierced straight through the pleasure haze around her melted mind. She always felt compelled to answer (as best she could). “Who is better, my cock or your fishy girlfriend’s dildo?” “Yuh-yours, yuh-yu-yooours iisssh buh-beeessshtt!” declared Alphys, she’d never be able to go back to worthless sex toys. Even Undyne’s extra long tongue couldn’t compare to the big human dick pressed against her g-spot. “Cuummsshiinngghh!” cried Alphys, her eyes crossed as she came again. She couldn’t stop herself and quickly her body went limp. Only Anders’ fat dick was keeping her from falling off the seat. “Don’t cum on your own again, slave.” Ordered Anders, “My pleasure is your primary concern, do you understand?” “Hnngggh, yyeeessh sowwwrry!” babbled Alphys. Anders smiled and pulled a lever at the side of the chair, letting the back recline as he continued, “Good, now move those hips faster.” SLAP! SLAP! SLAP! “AHHHNGGH!” mewled Alphys, compelled by her master to bounce up and down on his dick. “That’s a good little mook. Keep riding your favourite dick until you’re completely addicted,” said Anders. He let out a satisfied sigh as he relaxed, folding his arms behind his head as he watched Alphys bounce her hips up and down his dick. “Ahhnnggghh lluvvv cooowwk!” cried Alphys, the pink hearts in her eyes beat to the rhythm of her hip movements. The sound of sloppy wet slapping filled her office as her ass slapped against Anders’ body. Alphys felt so exhausted, her body was shivering with each movement, so close to cumming but every time she was about to go over the edge she was pulled back. Her mind even in a melted state wouldn’t allow her to disobey. The only option she had was to move her fat yellow ass faster and faster. “I can hardly tell you used to be a dyke.” Said Anders, “you’re taking cock like a pro now. I bet Undyne won’t even recognize you.” “Duuhh-do-don’t cuh-care,” sputtered Alphys, “wuh-want cuuuummmmhhhnn!” “Haha, such a pathetic little cum slut. You didn’t even last one round before you forgot about your girlfriend.” “Nnnyygghhaaaa!” drooled Alphys, she could barely understand what her master was saying. There was nothing else she needed to remember in this moment, nothing else mattered but milking her master, and she would be rewarded for her devotion. Anders grunted as he grabbed her soft hips. His fingers sunk into Alphys soft flesh as he bucked his hips and dumped a extra thick womb clogging load directly into Alphys’ cunt. She could feel his virile sperm swimming around her womb, desperately searching for her eggs as her stomach expanded. “Huff… Huff… Suh-so full,” groaned Alphys. Her hips stopped moving and she sat, drooling with heavy eyes. She looked down and rubbed her bloated belly, giggling to herself as she felt a heat radiate through her body. “Mmmmnnggh, did I tell you to stop moving?” Anders sarcastically asked as he spanked Alphys’ ass. “Ahhnngggh!” sputtered Alphys as her cheeks jiggled. She immediately snapped out of her haze and looked over her shoulder at her master. “Keep bouncing those hips, and be quick about it. I'm still super backed up.” “Haaaahhhnnggh, yuh-yes master, I obey,” drooled Alphys as she started moving her hips. “That’s nice,” sighed Anders, “I wonder if all monster girls are as built for breeding as you, Alphys.” “Hnngggh, I exist to take your coooowwwk!” Cried Alphys as she moved her hips faster. Her tight pink monster girl pussy gripped Anders’ shaft hard as she rode him. The pleasure of obedience nearly overwhelmed her mind but she kept bouncing. “Hmmmm, after you’re done milking me, I want you to give your girlfriend a call.” Ordered Anders as he gave her a playful smack on the ass, “I have an experiment I want to try out.” “Ahhhnnggh, yeeessh maaasshtter!” cried Alphys as another orgasm rocked her brain. She hoped deep down that her master would introduce Undyne to this pleasure and lucky for Alphys, she was very right. Chapter 2: Moulded Determination Undyne felt terrible, her whole world was filled with piercing throbbing pain for just a moment. Then the sudden realisation that she was restrained by something was immediately apparent. Perhaps Alphys was playing a prank? The last thing Undyne remembered was Alphys serving her tea dressed in a new maid outfit. She seemed extra happy to have Undyne over today. Then, nothing… “Mmnmmmggh!” cried Undyne, but only muffled groans came out. Undyne eyes shot open to a disturbing display. An underground lab of some kind was before her. Long pipes and thick wires banded by thick iron bands made up the roof. The occasional sound of hissing and running fluids echoed slightly in the otherwise quiet room. Undyne could see all kinds of mixtures lining large metal tables, bubbling chemicals ran between glass tubes and sleeves. They changed colours multiple times before settling on a glowing pink, right before being sucked into a pipe going into the cold metal walls. Huh… Well I could still be at Alpyhs’ place, Thought Undyne, And the bondage on my body could go either way too, hmmmm… Never thought Alphys was into bondage. When Undyne looked at her body she noted that all her limbs were sealed inside the wall behind her; good thing she was flexible. Her well muscled naked blue body was on display, muscled thighs and a puffy blue pussy with a trimmed red bush. Her muscled midsection had little bullets of sweat running down her abs and coating her under boob. Both Undyne’s perky C-cups were visible. Two little orbs of soft blue flesh tipped by little pink innie nipples that were pierced by little steel barbells, which kept her nipples poking out from their sheathes. “Alllmmmpphhsshh!” groaned Undyne, her cries muffled by the gag as she shook her binds. She didn’t want to break Alphys’ restraints but Undyne still wasn’t sure this was Alphys’ bab. However, the restraints were a lot stronger than she expected. Undyne couldn’t make them budge no matter how hard she moved or flexed, and after a good ten minutes of struggling all she did was tire herself out. “You look tuckered out Undyne.” Said Anders as he emerged from the shadows to her side. “Mmmgghh-Ahduuurrssh!” Gurgled Undyne as she narrowed her eyes. Due to the room’s only light being two fluorescent tubes it was a bit difficult to see, but it was clearly Alphys’ assistant. “I wouldn’t try talking with that gag in your mouth. You’ll only waste energy you’ll need for the transformation.” Anders paused and looked over his shoulder, “Isn’t that right Alphys.” “Yes master! Undyne should be thrilled to be your newest pet!” “Alllpphhsssh!” Sputtered Undyne, her eyes wide as she watched a bimbofied Alphys walk out in front of her master. Dressed in a tight latex maid outfit. The extra tight cosplay costume clung to her now extra wide curves. Her arms and legs were tightly hugged by a pair of arm sleeves and latex thigh highs. Both had bits of white latex at the end, made to resemble the doily fabric of a maid outfit. Her black mini skirt barely covered her crotch and her top covered her midsection and the tops of her boobs, but left the majority of her tits on display. Each of Alphys’ new nipples were covered by a pair of large heart shaped latex pasties, which clearly showed the outlines of her naughty bits. Undyne could hardly believe how much Alphys changed, and had trouble not being a little aroused by the display, but those feelings were quickly overshadowed by explosive rage. “GRRRGGGHH!” grunted Undyne, her eyes flared with rage as they fixated on Anders’ smug face. “Oh look, Undyne is having a bit of a tantrum-” “RHHHGGGGNN!” grunted Undyne as she bit down on her gag, straining the plastic. “I wouldn’t bother trying to speak. Anders cautioned, “that gag is firmly-” EEERRRRK-CRACK! “WHAT THE FUCK DID YOU DO TO ALPHYS YOU LITTLE CREEP!” shouted Undyne. She raged against her bounds, trying to push any one of her limbs out of the wall, but her gag appeared to be the only part of her restraints with any weakness. “Huh, I’ll tell you what.” Said Anders, “You tell me why you wear an eyepatch over a perfectly functional eye and I’ll tell you how I melted Alphys’ brains, deal? “I’M NOT TELLING YOU SHIT YOU LITTLE-” “Hehe, she thinks it makes her look cool.” Giggled Alphys. “Alphys!” shouted Undyne, “why are you obeying this freaky little shit!?” “Like uuuhhhh, it’s it obvious?” she giggled, drool dripping off her maw, “Master’s toats the best and his cock is like way better than your strap on. I can’t stop cumming when he fucks my dirty monster bitch-slit!” “Such an obedient little slave. You completed your task perfectly.” Said Anders, condescending and smug as he pet Alphys on the head like she was a dog. “Duh-heh-hen, thankies master! I hope you give me a little reward.” Cooed Alphys with a dumb drooling smile on her face. She squatted at her master’s feet with legs spread, tail wagging and hips gyrating with joy. It was like she was pretending to rub up against something as she let out drooled moans of pleasure. “Alphys, you gotta snap out of it!” “She can’t hear you bitch, my voice is the only one left in her head.” “Shut up!” shouted Undyne, “I’ll kill you and snap her out of the trance.” “It’s much more than a trance, you silly fish. My will has seeped into her very soul and it’s never coming out.” Spat Anders as Alphys pressed her snout against his crotch and snorted her master’s heavy musk. “That’s not true, Alphys tell him-” “Snoooorrrtt! Hehehe, reeeward maaaster!” begged Alphys as she rubbed her crotch, completely oblivious to Undyne at this point. “This has to be a dream.” Muttered Undyne under her breath. She could clearly see the latex thong grip her cunt, and just above was a red heart tattoo with a capital “H” in the centre. Yet, the most disturbing detail was Alphys’ moans, genuine and loud. They rang in Undyne’s ears as Alphys gooned like a maniac, undeniably addicted to her master’s touch. “It took days of conditioning to put her cum saturated brain back together after I fucked it into mush. However, now she’s no better than a bimbo.” Continued Anders as he pushed Alphys’ head against his crotch, “I keep her as a minion, a dumb little mook that cleans and cooks, but for my plans I need someone more active-” “Hahaahah!” cackled Undyne, her laugh harsh as she smiled a toothy grin, “I’ll never serve you. So go nuts with my body, make my tits bigger, fuck my cunt or arse, and try to brainwash me. I don’t give a shit, because the second you show the slightest sliver of weakness…” Undyne paused and gnashed her teeth as she seethed, “I’ll rip out your jugular.” “Oh, I know and I completely agree.” “I’m sorry, WHAT!?” spat a confused Undyne. At the moment she didn’t understand why he would so easily agree with her, but that quickly changed. “Unlike this pathetic mook you have a strong soul, and I intend to mould it to better fit my needs, but first we need to change your body.” Continued Anders as he clapped his hands and down from the wall descended a trio of mechanical arms with long injectors tipped by sharp needles in place of hands. Beneath them was a clear ovoid container filled with a neon glowing liquid. “Du-do your worst you limp dicked faggot!” Spat Undyne, staring Anders down. She wouldn’t be intimidated by his little gizmos, whatever drug was in those containers would not break her no matter what! “Limp dick? Do I look limp, Alphys?” asked Anders. “Hnnggh, of course not master!” Drooled Alphys pulled down his sweatpants, “Your cock is incredible as always. Whu-what the fu-mnnggh!” Undyne had to bite her lip, nearly drawing blood. She had to stop her gasp as she saw Alphys whip out a massive foot and a half of cock meat. A disgustingly thick and veiny monster girl womb destroyer with a fat’n flared pink tip and Alphys looked thrilled to have it pressed against her face. “Hnngggh, see Undyne!” Drooled Alphys as she rubbed her master’s shaft against her snout, “Master’s cock is super amaz-ding!” “Mmnngghh!” Undyne kept biting her lips, she averted her eyes for just a second. It was hard to look at such a filthy dick, but watching Alphys go googly eyed for it was too much to bear. “It’s even gotten bigger. I’ve gained an extra five inches since I started fucking Alphys.” Grunted Anders, clear pride in his voice, “It’s almost like nature is rewarding me for seeding your slutty lizard bitch holes.” “Haannnggh! Hanngggh! Yuh-yes master, your meat has swelled with my stolen determination!” Cheered Alphys, her voice sloppy, “but please take more master! Fat human meat poles belong in monster bitch holes, and my determination is more than a fair price for that pleasure!” “Now then.” Anders paused and clapped his hands, causing the injectors to stick into Undyne’s bare flesh, “Shall I give you your reward?” “Hehehe, yeah, yeeaaah!” giggled Alphys. “Hhnnggghh!” cried Undyne as she felt the needles pierce both her exposed tits and midsection. She was pretty sure the injectors shot their loads extra deep in her body and soon it felt like fire was flowing through her blood, but she didn’t break. Undyne hardly let out a squeal, but she couldn’t keep but wince as she watched Alphys kiss Anders' cock tip with a feral lust that Alphys never showed Undyne. “Undyne, do you know what she requested from me? The reward, which was so important that my little mook so happily drugged you and placed you in those binds.” “Hnnngghh, fuck off.” spat Undyne. Unable to get off more than a few drooled words thanks to the pain. “She wanted me to fuck her brains up again.” Continued Anders as he pressed his fat cock head against Alphys’ inner ear, “And after a little tinkering, I can!” “Ahhhnggghhh-ddduuhhh!” cried Alphys as Anders' cock head entered her ear hole with a wet, Shlorp! “That’s a good little mook, just stand there and I’ll take all those silly thoughts away.” Said Anders, his grin growing as he shoved his length into Alphys’ ears. Undyne watched speechless as Anders sunk every last inch of his dick into Alphys’ ear before he started pumping. His sloppy meat was already drooling pre-cum over the inside of her skull, coating her ear drums on the back pump before he thrust back inside. Undyne could see ropes of spilt pre-cum leaking out of both Alphys’ ears, and she looked thrilled. “Heehnn-duuuuuurrr!” giggled Alphys, her voice sloppy and saturated with love. She didn’t care that Anders was using her mind as a literal sex sleeve. To him she was just a cheap ona-hole, a piece of meat to use and abuse before discarding, and Alphys loved every second of it. “Duuhhhh-hehehe, mooooore!” she cried as Anders grabbed her head and slammed his meat deep inside her ear. His heavy nuts slapped against the side of her face and Undyne winced as she watched Alphys soak her latex throng, her juices running down her inner thigh. “Hnnnngggh, Alphys…” Muttered Undyne, pissed but also ashamed she never made her lover sound like that. Anders was easily making her lover spit moans of pure pleasure. Her face a sloppy drooling ahegao that Undyne never got close to her making, and it made her shamefully jealous, and Alphys’ moans were even starting to turn her on. “Hnnggghhoooo!” moaned Undyne, her eyes rolled up into her head as she felt her pussy pulse. Shocks of pleasure ran up Undyne’s spine with each moan Alphys made, she could feel her resistance start to fade, and with that her body started to change. “Mmmmph, finally,” grunted Anders, pausing his pumping for a second to give Undyna a smug smile, “I was worried for a second that I fucked up the mixture.” “iHnnggghh, whu-what’s hu-hu-happa-nnggghh!” Undyne grit her teeth as she soaked the ground beneath her with a jet of pussy juices. She felt incredibly hot, her face grew sloppier by the second as she felt her lips grow plumper, reaching silicon slut levels of volume as Anders' laughed. “Haha, it seems like your body is taking to the formula quite nicely.” Chuckled Anders as he kept fucking Alphys’ mind, “Though try not to pass out before the show is finished. You won’t want to miss a second of what’s about to happen.” Anders' brutally raped Alphys’ brains as Undyne continued to change. Her tits started to become larger, increasing in cup size with every passing second until they settled somewhere between beach bimbo and monster brood mother. Her new tits were massive! A pair of tits that extended a good foot and a half off her still toned chest, both perfect plastic looking orbs tipped by dark blue nipples. If that wasn’t too much the sensitivity was cranked past what Undyna thought was possible. The cool temperature was enough to make both nipples hard, and with each change her cunt throbbed. Her new pussy lips were being moulded at the genetic level to take the same fat human cock that was scrambling her girlfriend’s brains. As she felt her pussy pump up, her ass got large enough that it pressed against the wall behind; a perfect perky bubble booty. Undyne squirted, her clit swelled as she felt her cheeks squished against the cool wall, her pussy’s constant throbbing was driving her crazy and it was getting worse. “Oh good, the process is starting. I was beginning to get worried.” Commented Anders as he looked away from Alphys’ drooling body. “Nnnnggghhhaa!!” moaned Undyne, her voice cracked as neon strands started flowing through her body following her veins. They pulsed and flickered as they spread all across her skin and ran down her limbs. Undyne expected pain, but instead she just felt shocks of intense pleasure as the veins started concentrating around her abs. Hnnnnggghhh, fuh-fucking hell!” Sputtered Undyne as she soaked the ground beneath her again. Her tightly muscled stomach bloated slightly and quickly Undyne was feeling full. Something was pushing trying to get out of her asshole, but Undyne felt like she couldn’t let it out. “Take my load you retarded cumbrain!” Spat Anders as his cock flooded Alphys’ head with cum. His seed saturated her grey matter as Alphys giggled like an idiot, thrashing her tail against the floor as her I.Q dropped into the negatives again. “Hnnggghrreee-aaaaahhhhnnn!” gurgled Alphys as she drooled on both her big bimbo tits. Cum poured from both her ears as Anders pulled his meat out of her head. Alphys took a few steps forward, her eyes crossed as she let out a guttural groan of pleasure before… falling on the floor. “I’ll have to put her brains back together before she’ll be useful again.” Sighed Anders as he shook his head. “Hnnngghhh! Whu-what’s happening,” grunted Undyne, her nostrils flared as her muscles tensed. “I’m going to deal with that pesky determination you have, but don’t worry it won’t hurt.” Continued Anders as he walked over to the wall and pulled a leaver. Undyne’s eyes darted down. It was hard to see with her new massive tits, but it was clear something was popping out of the wall. Two steel panels parted and a large funnel was erected under Undyne’s ass. It was only a couple inches off the floor, and attached to the bottom was a large black pipe that went into the wall. “Hrrggh, I will never give in.” Spat Undyne, “Even if you change my body, torture me or fuck me with that dirty dick. I’ll never give you the satisfaction and I’ll-hnnggghh!” “I don’t need to break you, to use you.” Interjected Anders as he grabbed Undyne’s tits, his hands twisting her new extra thick nipples as he pressed his cock against Undyne’s perfect blue abs. “Nyyggghhh!” moaned Undyne. Because of whatever was happening to her body she was extremely sensitive, and even the slightest throb of Anders’ cock was enough to push her to the edge. “I just need to remove that pesky determination from your vessel.” he continued, as he pressed his cock against Undyne’s pussy. Her soaking muff rubbed over the top of his tip as Undyne shivered in his grasp. “Hhnngggh, du-do your worst fag! I will not-huunngghh!” moaned Undyne as she felt Anders' cock bury itself inside her pussy. His fat tip pressed against her g-spot and immediately Undyne responded with a guttural groan. “Hnnggghhhh-fuusssshh!” she sputtered, eyes fluttering as a barrage of micro orgasm fried her brain. The feeling of being used as a cock sock by a hung human man felt so much better than Undyne could’ve expected. All her resistance, and posturing melted as Anders' tip ground inside her womb “Wow, that was really fast.” Said Anders as he started thrusting, his fat tip swelled and leaked pre-cum over Undyne’s insides. All the sperm that clogged his urethra bubbled up inside her womb. It was so hot and the sudden injection of molten human sperm made Undyne melt and her asshole loosened. “Ahhnnggghhhnooooohhh!” groaned Undyne as she came hard, harder than she ever had in her life. Her muscles relaxed and her face strained, eyes rolled up into her head as she started to push a rope of solid light blue jelly out of her asshole. “You broken slut, keep pushing out your personality! Let your mind fade away and let my superior will, replace your own.” Grunted Anders as he ruined Undyne’s cunt. “Hnnggghhh!” groaned Undyne as the jelly-like substance came out of her hole like a thick rope of soft serve ice-cream. Her light blue personality coiled as it landed in the funnel beneath her holes. Pussy juices rained down with each movement, coating it in sparkling cunt honey as Undyne felt her brain melt. “Hnnggh… nuuhhh-cuh-cuuummss…. Nuh-moooorree!” begged Undyne between panting breaths. She wanted the pleasure to stop, every thrust pushed more of her personality out. There was nearly a foot tall pile when Anders' started cumming, the last of her personality landed in the funnel beneath her as the pipe pressurised and started to suck her personality down. “Mmmph! Have fun Undyne,” grunted Anders as he filled her body to the brim, “I’ll come and see you after I finish fucking your…” Anders' voice trailed off as Undyne received another mind shattering orgasm. Her head felt so light, and thought that she was about to pass out. The world around her faded into black, her body felt fluid and so was her mind, thoughts fell out of her consciousness as soon as they began. Undyne couldn’t even focus on anything, nothing felt real anymore and the passage of time felt so slow. Undyne felt like she was in a dream like drift for ages. Then, a dull hiss of pressurisation cut through the haze that was her mind and Undyne felt some awareness return, but not enough to tell what was happening. There was a sudden bright light and she saw a hand reach down towards her. It was difficult to tell who it belonged but it looked like it belonged to… herself?! Undyne was looking at her bimbofied body, clad up to her neck in a tight black latex suit. There appeared to be holes around her crotch, and nipples to allow for easy access. Her new puffy bimbo lips were coated in dark red lipstick, and her eyes were empty. Two dull pools of blue that appeared to be staring off into the distance as she pulled Undyne out of the mould. “It looks like my mould worked! Your determination made the perfect ona-hole, Undyne!” “.....!” Undyne shook and trembled (which was the extent of her dexterity) as she realised she had been turned into a ona-hole parody of her former self no longer than a ruler! Surprisingly she could see surroundings, but she couldn’t speak. Her new sex toy form followed the vague shape of her body, minus and limbs she once had. She had flat stumps where her limbs should be, but as expected her ass and tits were maximised. With an absolutely massive pussy, no doubt to be used to take Anders' massive cock. “Now let us test you out.” Said Anders as he sat on the edge of a nearby desk. His massive monster girl bitch breaker on display, with a tip drooling pre-cum. Undyne couldn’t see much of the room, but she could see Alphys stuck in a nearby pod. Her ears were being raped by long pink tendrils as she rubbed herself raw. Undyne was happy Alphys was still alive, but she had to focus on keeping her sense of self. “Drone, pleasure your master with your new toy, and don’t be gentile, we have to break it in properly.” ordered Anders. “Yes master, I obey.” Drooled Unyne a blank stare on her face as she walked over to the desk, leaned over and positioned ona-hole Undyne’s pussy right over top of Anders’ fat cock tip. Her tits hovered just above ona-hole Undyne’s head, her grip tight and steady as she slid Undyne’s pussy over Anders' massive cock head. “......!” Unyne remained silent, hoping to scream but her silicon mouth was only good for show as she felt over a foot of cock meat enter her tight silicon insides “Does the pace suit you or should I get a new toy, master?” Asked Undyne, the only concerns and thoughts she had left belonged to her master. “Hmmmm, your old determination feels surprisingly tight, I guess it just needed a skilled hand to mould it.” Responded Anders, a satisfied grin growing. “Yes master…” “But you should move the toy a bit faster. She should be able to handle some rough treatment.” He continued, knowing full well Undyne could feel and hear every word. Holy fuck I am going to die! Thought ona-hole Undyne as she started to get used faster. “Yes master, I live to serve.” “Mmmm, much better,” sighed Anders, satisfied as he felt the soft silicon squeeze his cock. Every inch of his shaft had sunk into Undyne and he created a massive blue bulge that poked up through her silicon titties. She was holding together surprisingly well. He was ready to relax on the side of the desk, while Undyne fought for her life. I am not a toy! Thought Undyne with each pump. She was desperate to cling to her sense of self with every fibre of strength she had left. Her body had already betrayed her completely, but if she could hold onto her mind there was hope, but it was getting hard. “Mmmmph, fucking hell you’re tight.” Grunted Anders as he shot a thick jet of pre-cum into Undyne’s hole. Ropes of thick cock cream bubbled out her mouth I… hnnggh, I am not a toy! thought Undyne, defiant as an orgasm shocked her very soul. They came one after the other, seeping into Undyne’s mind like a drug. They made her hazy as she mentally repeated; I… I ah-am not a toy! I… I am… I am not a…a toy! I… I… I am… I am not a…a… toy! I… I… I not a… not… not… ahhnngghhh!” “Move faster drone I’m gonna cum,” ordered Anders. “Yes master, please cum hard.” Drooled Undyne, her lips curled into a soft smile as she squeezed toy Undyne hard and started pumping. She could see her master’s cock tip leakings tons of cum and it only motivated her to use the sex toy harder. Undyne however… I… I am a toy! I am a toy! I am a toy! I am a toy! The raw pleasure of being filled like a cheap condom short circuited her brain. In a moment she forgot about everything else beyond Anders’ cock. It felt so perfect inside her body like she was made especially for him. Her existence as a toy felt so right, but slowly Undyne’s mind returned just as Anders finished cuming. “Mmmph, not bad, keep that toy close for the time being, drone. I may want to use her again.” ordered Anders. He looked at ona-hole Undyne’s combloated belly, it was nearly the size of her body and distended to the point it could rest on his body. Her silicon skin was stretched to the point Anders could see his tar thick sperm swirling around her belly as little spurts of his cum load leaked from the ona-hole’s fake mouth. “But for now toss her to the side and put that fat blue ass to good use.” Ordered Anders, “We’ll give your silly ona-hole some time to drain naturally.” “Yes master, I obey,” moaned Undyne as she tossed the ona-hole over her shoulder, and hopped on the desk before continuing, “I hope you enjoy your drone’s holes.” Ona-hole Undyne’s cumbloated form was tossed on the floor, leaking cum from both ends as she watched, painfully aware of what her actual body was doing to Anders. He used her latex clad body no differently than the ona-hole, ordering Undyne to ride his cock. Undyne watched her own enhanced ass bounce up and down on Anders' cock. Her perfect blue cheeks clapped together as her asshole was stretched to its limits. Undyne wanted to feel shame for forgetting, hatred for Anders or even determination to save Alphys, but instead she just felt jealous. Now months later… “Hey drone, come here for a second.” ordered Anders as he turned to Undyne. “Yes master,” drooled his drone. Undyne hadn’t changed much the past few months. She had a new bright red humaned tattoo over her crotch to match Alphys and a large barcode printed on her ass with the number-001, printed over her cheek. Her new visor affixed to her ears and was a large screen that only left her lips visible, and constantly displayed a large pink swirl. “Finish what you are doing and come to me.” continued Anders. “Yes master, I obey.” Said Undyne nodding as she shoved an unconscious dog girl she was carrying into one of the drone conversion pods. The half conscious brown dog girl winced as Undyne affixed the visor to her ears. Two long slimy pink tendrils entered her ears and caused her to shiver and groan. Then, the pod door shut and the machines started to do their work. Long tendrils entered her holes and injectors modified her body to better suit a new drone. Undyne didn’t wince seeing any of this, she’d captured and dronified a couple dozen monster girls at this point, and only her master’s will mattered. “How can your useless drone serve you, master?” Asked Undyne as she walked over to Anders and stood at attention. Tits pushed out and arms at her side with a blank drooling expression as she watched her master moving some boxes to the side. “Look at what I found under this box of used sex toys.” Said Anders as he kicked ona-hole Undyne to her dronified body's feet. The magical blue silicone that formed ona-hole Undyne’s body was still intact. Her oversized blue pussy and sloppy o-face were both leaking cum from both ends. She was clearly freshly used, which made sense. Over a month ago Anders got bored of Undyne and told her to stick ona-hole Undyne on a brown skinned futanari, a human investigator named Fae or something. She wasn’t very smart and challenged Anders directly. She talked a big game about justice and it being wrong to turn monsters into drones, which resulted in Undyne giving her a hefty beatdown before she got a collar. Anders didn’t expect much from her, but she made a surprisingly diligent mook. Though her worthless girl-cock kept leaking over the floor and it was making quite the mess. However, quickly her master came up with the brilliant idea to use ona-hole Undyne as a cock cover and it solved the leaky cock problem, but now… “We’ll have to find a new way to stop her from leaking over the floors now.” Anders shook his head, disappointed before he ordered, “But for now. Drone, pick up your old personality and hand it to me. I have an idea.” “Yes master,” moaned Undyne, her fat silicon lips leaked a bead of drool on her tits as she bent over. Her fat latex clad cheeks clapped as she picked her old personality off the floor. Then with her head still bowed she presented her ona-hole self to Anders without an ounce of hesitation. “I’m surprised you’re still intact, but you were always a tough bitch.” “Uuuuhhhnnggghh,” drooled Undnye, “Present for me, drone.” “Yes master, my body is your property, please do as you wish.” responded Undyne. She happily bent over, a small smile grew on her lips as she spread her fat blue bubble butt. Her asshole was even sluttier after months of training. Two massive dildos were shoved deep inside her thick dark blue anal donut, along with a long line of fist thick anal beads. Undyne’s asshole was completely stretched to meet her master’s needs and she’d need the room for what he was about to do. Anders grabbed the loop attached to the end of the anal beads and he pulled back hard. Undyne barely reacted, drooling and moaning softly as the dildos and over a dozen beads flopped out of her hole. “Now let's see how much of you survived the transformation.” “Duuuuhhhhhnnn!” groaned Undyne as Anders shoved ona-hole Undyne up her own ass. Undyne’s pussy throbbed at the sudden rush of pleasure as her jaw hung slack. Yet, she kept her cheeks spread as Anders' slowly sunk the ona-hole deep inside her asshole. “Here let me help push it deeper.” Spat Anders, a sadistic smile on his face. He pulled out his massive cock, now nearly two feet long, the bat thick shaft thickened near the tip, and pulsed with thick pinky thick veins and a womb destroying pink tip. His manhood was beyond that of a normal human. Charged up with the determination of multiple monsters and he used his power to mess up Undyne even more. Anders shoved his cock into Undyne’s asshole, shoving the ona-hole deeper inside her bowels. He could feel his trained drone tighten her asshole around his meat. Her tight pink walls squeezed him, trying to milk his cock for every load he had and she did it without complaint. She obediently stood, dumb and drooling as Anders used her asshole like a cheap cumdumpster. Then she started to moan. “Uhhnnggghh… so… so goooood!” drooled Undyne as a little life flickered behind her empty pink eyes. Her body started to shiver as neon pink tendrils shot all over her body. They were bright enough to be visible through the latex and Anders looked incredibly pleased with himself. “Finally, I was getting worried you two couldn’t merge anymore.” grunted Anders as he pulled his cock out of Undyne’s gaping asshole. Ropes of his thick pre-cum glazed her donut as his tip popped out. Anders took this moment to give Undyne’s fat ass a heavy slap with his dick, half expecting to spur an angry response out of Undyne while her programming melted her brain. But instead he got scolded. “Master, why on earth did you stop fucking my ass?!” Cried Undyne, her sloppy voice had an inquisitive hint, “I’m still tight and should be even stronger now that I’ve got my determination back.” “Interesting, no anger or spite?” Asked Anders as he took a cautious step back, “I thought you were going to tear out my throat and rescue your girlfriend-” “Fuck no, master! I just want you to keep ruining my asshole, it’s my only purpose.” Shouted Undyne, panting as she looked back to Anders. “And how did you realise that?” “After you first fucked my silicon form I was bitter. I spent weeks being your personal sex-toy and I felt every mind melting orgasm you graciously gave me. There was not a day under your care that I didn’t cum a dozen times. My favourite act was being shoved into Alphys’ loose ass to serve as a much tighter hole, but despite the pleasure you brought me I remained delusional. I clung to my former sense of self, pretending I was not a toy.” “Go on slave,” said Anders, “what finally broke you.” “When you put me on that worthless leaky bitch!” Cried Undyne, tears welled in the corners of her eyes, “That stupid futa was useless, her cum was pathetic, her shaft was small and he cock was too weak, even by monster standards.” “Oh you poor thing,” chuckled Anders. He assumed Undyne could barely think by the time he tossed her out, and found the idea of a love struck ona-hole amusing. Undyne nodded quickly, affirming her master as she continued, “Then at the end of every day she handed me to Alphys to clean my holes and her tongue felt like nothing compared to your mighty spear, your divine human meat hammer! In that moment I realised how lucky Alphys and I were to be your slaves. Every single shred of my soul cried out to be your toy again. To once more be allowed to feel your cock deep inside me, I was wrong to ever want to be free of your will.” “So you’ve realised your place as a toy?” “No master, I am not a toy.” “Then what are you?” “I am whatever you want me to be master! Please define me in whatever way you wish, I need you to tell me what to do. My smooth fish brain needs to follow someone else’s orders and I would be happy to be a soldier, sex slave, worker drone or even your chair.” Undyne dropped to her hands and knees and crawled to Anders' feet before planning a sloppy kiss on his shoes. “I didn’t tell you to stop begging.” continued Anders. “Mwwaaaah! You deserve to break, bimbofy and brain drain every last monster girl that exists. Just please let me help you do it. Let this pitiful bitch serve you in any capacity you see fit before you finally decide to melt my mind completely. I’ll beat, rape or brain break whoever or whatever you want master, just please keep meeeeh!” “Hmmmm, alright drone, you can stay.” Said Anders as he stepped on Undyne’s face. He ground her sloppy ahegao against the cool steel floor as his cock leaked thick pre-cum over her back. Not in his wildest dreams did he expect to completely break Undyne’s mind, body and soul, but he had done it and there was no going back for Undyne. Not that she’d want to. “Hnnnggh, muh-master’s shoe,” drooled Undyne. Her tongue flopped out of her mouth as she drooled, “please don’t hold back, be rough with me. I want to take it all.” “Such a pathetic masochist. No wonder you liked to fight, you just wanted to get hurt.” Spat Anders as he ground his foot against her face. “Yeeeesssh, yeesssh! I loved the rush, but I love your cock a million-billion times more ma-shhhhtter!” “Well don’t just lay there,” said Anders as he pulled his foot off her face, “present for me so I can finish cumming, I am in need of a tight ona-hole.” “Hnngggh, thank you master!” Cried Undyne, weeping tears of joy as she stood up and spread her cheeks for him. Her asshole had already re-tightened from the prior abuse but still had a light glazing of pre-cum, but was practically begging for more. “Ona-hole Undyne is ready for duty.” She continued, striking a double peace sign beside her head, “Please fuck me until your heavy human nuts are completely drain-hhhhhdddd!” “Well said, slave.” grunted Anders as he shoved his cock into Undyne’s depths. “Hhhnnngggg-ffinaaalllieee!” cried Undyne as over a month of sexual denial was scratched in one thrust. She could feel her brain going blank as Anders started to thrust. His fat veins pressed against her walls, and crushed her womb with every heavy pump, but Undyne loved it. This was her life now and if she had it her way, it would only be the beginning of Anders’ tale.