Chapter 1: The Rebirth of the Shie Hassaikai.
Chapter Text
In a room within the Heights alliance dorms of the U.A. high campus, Eri is tossing and turning in her sheets, a nightmare flowing through her mind and feeling so, so real to her. Within her mind, she sees Overhaul reaching out with his hand towards Eri’s face, the corpses of her new family lying broken around him, calling her a monster and that this is her only purpose, and that she’s been a bad girl, running away, thinking she could live a happy life. When suddenly, she screams in her sleep, waking up Izuku, who is currently taking care of her while Aizawa is on a patrol. He shoots up, running over to take Eri’s small quivering hand. “Eri! Eri wake up! It’s just a nightmare! You’re fine! You’re safe!” He exclaims as he rocks her awake, not noticing her horn sparking before a wave of bright white light shoots out engulfing everyone, and everything, between the two hero course dorms.
As the bolts passed through everyone and everything in range, things began to change. The first to feel the effects was Ochako, unimaginable pain tearing through her body as a transformation started. Her hair turned a darker shade of brown and started to retract into her skull, turning into a shaggy little mop of hair. Her body swealed as she screamed in agony, her bones extending painfully as she grew taller. Her nipples started to release air, her breasts deflating like balloons, the perky flesh sinking into her chest. Around her the walls changed, blank, grey concrete starting to form from within, the structure itself beginning to mutate.
The bright light went through Izuku too but doesn’t seem to be doing anything. He blinks in confusion before shaking his head as he refocuses on Eri. “Eri, are you ok? It was just a nightmare, everything is fine now, because I am here!” He says as he picks her up and lets her cry into his shoulder. “I... I th…thought I was back… with overhaul! A-a-and you were all... all...!” Eri sniffles. Unnoticed the building begins to warp, the roof of the dorm shifting and changing, forming the roof a traditional Japanese style building, similar, no identical, to the one above the Shie Hassaikai base.
Ochako's screaming gets worse as her face reshapes, her voice cracking as it takes on a far deeper tone. Her breasts at this point have become a simple, flat chest, and her clothes start to tear as she grows. Her ovaries start to push out of her vagina, her clit extending and flopping around as she became he, his new, meaty cock proceeding to let loose a blast of cum. A pounding in his head began, strange wants assaulting his mind and feeling of being dirty overtaking him, and as he dragged his fingers over the ground, they left groves in the concrete floor. By now the inside of the dorms had begun to push into the earth, the rumbling shaking the entire campus.
The buildings shake a bit from them moving into the dirt, Izuku clutching onto Eri as he thinks an earthquake is beginning. “Don’t worry Eri, I think it’s just an earthquake, We'll be fine.” He says as he pets her soft, white hair soothingly to keep her calm. Unknown to either of them, the hallways are beginning to grow longer as the walls form into concrete, the bedrooms beginning to separate as they grow larger, their new forms overwriting the old, the kitchen areas beginning to warp and twist as appliances within change, forming into lab equipment and research tools.
Ochako let out a coughing breath as his changes stopped. His clothes, fitted for a teenaged girl, were now little more than rags on the adult man that she had become. More unfamiliar thoughts bounced around in his head, before his eyes snaped open to the truth. He was... he was Kai Chisaki, Overhaul, the man who would destroy this world, built on a disease. He didn't know why he thought like this, but he knew he had no choice but to fallow these ideas. He brought his hands to the torn remains of his clothes, using his new quirk to deconstruct them into something more fitting, dress pants and sneakers, dress shirt and tie. A large bomber jacket forms on his shoulders, and a plague doctors beak mask forms around his face to finish his transformation into the yakuza he had helped take down. He made a pair of surgical gloves and put them in his pocket, feeling that he'd need to use his quirk allot more, and not wanting to take them off and on again. If he had been changed, maybe there will be more, he thought as he walked through the changing halls to find someone his memories called 'Tsu'.
Izuku holds Eri as his All Might figures fall off the shelves, showing him that this was a bad earthquake and that maybe it would be best to leave. “Eri, I’m going to carry you out, this is dangerous.” He says as he walks to the door, opening it and entering the halls. His eyes growing wide in shock as he sees the halls warping, beginning to look similar to the underground base of the Shie Hassaikai. “Oh no, what’s happening! This isn’t good!” He cries out, looking around before he begins to run. Eri on his shoulder as he passes some of his classmates' rooms, who are starting to walk out to check on the commotion, and he hears what can only be screams of anguish coming from some of them, but all Izuku cares about is getting Eri out of the building as he desperately starts to search for an exit.
Overhaul found Tsu as a screaming wreak, watching the transformation he experienced from the outside. The girl's hair turned grey, before shortening and crumpling, turning into distinct arrow shapes. her clothes tore apart just like his did, and he watched in fascination as her nipples trembled before releasing air, the frog girl's boobs flattening as his own did, finding he enjoyed the sound. Her long, hanging tongue pulled into her mouth as her frog quirk vanished, and soon after her crotch exploded, a meaty cock and balls 'splort!'ing out of her lower lips, a small fountain of cum blasting from the tip as she completed his transformation into Overhaul's right-hand-man, Chronostasis. He looked at his boss in confusion, hand on his temples, and fear in his eyes, and Overhaul deconstructed his clothes into a full body white raincoat and black boots, a full-face plague mask covering his shocked gaze, the new man slowly nodding as he understood what he must do, his own mental changes taking root. Overhaul helped Chrono to his feet, and the two Yakuza began to search for one 'Ida'.
“I need to find Aizawa, maybe his quirk will work to stop whatever is happening!” Deku exclaims as he pulls out his phone while running, becoming more and more lost within the maze the dorms were becoming. Opening the contacts app, he begins to scroll before clicking on Aizawa’s number to call him the phone rings, before Aizawa answers. “What is it problem child?” He asks. As Deku shouts “Eri’s quir….” He shouts before the line goes dead, the phone lines no longer connecting to the surface as the structure itself starts jamming communications. As the building sinks further underground, now only having two stories above ground, it starts to stretch to its side, its twin on the other side reaching to meet it, the two dorms becoming one building. Soon after a similarly submerging Heroic heights B connects underground with A, the distraught students running around in a panic or agony, trying to figure out what’s going on.
The Yakuza duo found Ida clutching is body as he clawed at the almost entirely concrete earth. They watched as his body exploded with muscle, the already somewhat large boy becoming an absolute behemoth of a man, rivaling All Might in stature. His hair became a dirty blonde, before extending and spiking into an absolute mess, a thin beard sprouting from his chin. The men plugged their ears instinctively, and Ida let out a massive string of curses as he clutched his leg, his engines pulling into his calves before sealing themselves up. His clothes were in even worse condition that theirs were, Ida, no, Mimic entirely naked as he heaved. Overhaul saw to fixing that, the still female part of his brain not wanting to see his giant cock any more than necessary, creating some shoes, dress pants with suspenders and a pink button up shirt, before creating what seems to be some kind of doll. Mimic instantly sunk his gigantic body into the tiny thing, his quirk allowing him to manipulate it. Mimic shook his head and looked to expectantly to Overhaul, who simply placed his hand on the wall to bust it open, revealing Mina, Momo and Jiro on the other side, writhing in agony.
“No, no, my service is gone crap! I guess I need to find my way up to the surface.” Deku says as he looks around noticing that cameras are materializing into existence, while the lights become bright while LED’s, the walls looking sanitary and plain. As the halls become more and more maze like, leaving him unsure anymore if he’s going up or down. Using one arm he activates One for All and punches through a wall, entering into a different hallway. The loud echoing crash sounding through the halls, a second crash echoing from a fair distance away. He can hear more and more of his fellow students screaming in agony, whatever it was that was happening to them clearly causing great pain. “Eri don’t worry I’ve got you whatever is happening we’ll fix it!” He says as he begins to run down another hallway.
Overhaul and his lieutenants watched the three-woman blossom into their far superior yakuza forms. They heard that oh so wonderful sound of their useless flesh bags deflating into wonderfully flat chests, the squeaking music to their ears. Minas stupid pink hair fell out to be replaced with a shiny bald chrome dome, and Overhaul almost busted a nut at the sight of her hideous mutations vanishing, her horns shedding from her scalp, and her skin tuning a nice, normal shade, before her clothes exploded as her muscles bloated, her pussy vomiting out a jizzing cock as crystal formed on his body. Momo shrank and became thin, long black hair turning blonde and pulling into her scalp as her bangs covered her right eye, her clothes hanging lose on her new figure as the familiar bulge of his new cock tented his pants, cum stain forming. Jiro probably got the worst of it, her hair becoming a mess as her eyes bulged, her mouth growing to split her face in half, lips receding into his face to reveal her maw of square teeth in a permanent display, her own clothes more or less intact as her cock sprouted and soiled them. Overhaul quickly gave them new clothes, Mina, now Hojo, getting a black dress shirt and shoes and plain pants, a surgical mask covering his mouth, Momo, now Setsuno getting a green shirt with an orange tie dark pants, black beak mask firmly in place, and a purple dress shirt and grey pants, with a burlap sack over his head for Jiro, now Tabe. He ushered his minions to stand and fallow him, Setsuno sadly patting his new, flat chest as Hojo put a hand on his shoulder in understanding, Tabe seeming entirely spaced out as the three followed behind.
Deku bumps into Bakugo as he comes out of what might have once been his room, his hands sparking. “Damnit! What the fuck is happening! Deku do you fucking have a clue!” He shouts at Izuku as Izuku exclaims. “I’m not sure but I think Eri’s quirk did something! I tried to get in touch with Aizawa, but I lost service! I’m trying to get to the surface to see if Aizawa has any clues!” Deku exclaims as the dorms sink all the way underground, Hallways moving around in the dirt like it’s liquid, splitting and reconnecting to one another. “Fuck that’s not good, get Unicorn there out of here, I’m going to try and find Shitty hair!” Bakugo shouts before running off down the corridor, leaving Izuku to run the opposite direction in the slowly forming maze.
Watching Mineta change was an interesting experience for all of them. The tiny man convulsed, before his arm spasmed and then looked like it exploded, a truly enormous limb tearing out of its tiny prison. One of his legs was next, the skin almost tearing as its enormous replacement surged outwards. His remaining arm and leg followed shortly, before the six were greeted by a sight they would rather have never seen. Mineta's cock inflated to massive proportions, the five former girls looking away, all but Hojo glad their masks hid their blush. His body buked up next, fixing his proportions somewhat, before they heard his voice change and signal the transformation of his head. Overhaul wasted no time in covering him up, green jeans and a black tank top covering his body, orange running shoes on his feet, massive gauntlets covering his huge fists and a harness forming on his back and shoulders. His face was covered by his full head sock beak mask by the time they saw it, red lines running through it as he pulled himself to his feet, his massive body filling the corridor.
Deku runs down the hallway, bumping into a set of floating clothes on the ground, Hagakure screaming in agony as her body grows visible. Deku gasping in shock. “Hagakure! Are you ok, what’s happening to you!” He shouts as she just continues to scream as her nipples release air, a strange noise emanating from them as her chest begins to deflate, while her waist begins to expand and her hips narrow, her hair turning red as a scar forms over one of her eyes. Her skirt begins to form a bulge, a stain spreading across it, as she becomes he, her transformation continuing. “No, no what’s happening!? I, I need to get help, even people are changing!” Deku screams as he panics, while Eri screams and cries about how she’s a monster, Deku patting her to try to calm her down.
It was Todoroki the yakuza found next. Or more that he had found them. Despite being clearly in pain, parts of his hair darkening, he stumbled to face them, even not knowing what was happening, and sent a wave of ice their way. Overhaul had to give his former classmate some credit, he was strong, he hadn't been able to stand at all during his own transformation, let alone walk. But the ice was brittle thanks to him losing those powers, and Mineta, now Rikiya, was easily able to destroy it in a single blow, the shockwave robing the boy of the ability to stand, and the effort he had to resist his changes was used in that attack. Soon his body became long and lanky, his hair darkening to black as it stretched down his back, the man who stumbled up looking nothing like the scion of the Todoroki family. One touch from Overhaul fixed his clothes, now a set of dark brown pants with black shoes, his torso only covered by a beige vest that hung from his back. He was fitted with a blank, flat white mask with strangely bulging eye holes, before he was handled a bottle of beer by Overhaul, made from his old self's ice, And Shoto, now Sakaki chugged it without hesitation.
As Deku stares at him, Hagakure? Gets up breathing heavily as he glares at Eri. “Eri what are you doing out of your room, go back now!” He shouts, making Deku panic “What!? What are you talking about, Hagakure?! Why are you acting like this?!” Deku exclaims as Hagakure gets up activating some different kind of quirk, his hands glowing red, before letting lose a blast of energy, causing Deku to yelp and start running down the hallway again. ‘What’s happening!? Did Eri’s quirk cause everything and everyone here to change to match the Shie hassaikai or something?!’ Deku thinks to himself as he runs down the hallway, eventually finding a staircase, he begins to climb it, ignoring the shouts from the man once known as Hagakure.
Overhaul is soon called for by Setsuno, having found Aoyama writhing in a corner. His hair was pulling into his head, and his body, like everyone so far, was growing. His transformation was less extreme than the others, the result looking more like a salaryman than an intimidating villain, the man patting the ground in a blind panic, seemingly unable to see. Mimic handed his boss a pair of his old glasses, and overhaul used them as part of the nearsighted man's new uniform. The result was a body concealing black cloak, his head covered by wrappings and a bowler hat. His new glasses were affixed beneath his mask, looking the most like a plague doctor of them all. Now able to see again, Aoyama, no, Nemoto, looked at Overhaul, before seeming to prey to him. Overhaul thought this was weird but had no time to comment as two figures rounded the corner, Bakugou and Kirishima.
Izuku runs down the hall of the next floor, this one happening to connect to what was once the class B dorms. Running down the hall he sees Kendo Itsuka writhing on the ground, moaning with pain as her breasts deflate, her nipples releasing air, sounding like a balloon losing air, while her clit pushes out along with her ovaries as she, now he, cums all over his thighs. The rest of his body growing more muscular while he gains a blonde goatee, and his hair ginger hair becomes scraggly and blonde, his pretty orange side ponytail falling to the ground below before ceseing to exist. Izuku is forced to ignore him as he runs past the new goon, his panic growing worse.
The two heroes stand before them, the sparks of the change inching up their bodies, bakugou's hair looking shorter and Kirishima's longer and more untamed. Still, they through themselves into an all or nothing charge against the yakuza gang their classmates had become. With the transformation eating away at them however, Bakugou had slowed considerably, his explosions weakened by his changes. Similarly, Kirishima's hardening wasn't as impressive as it normally was. Despite their bravery, they couldn't do anything against Sakaki's sloshed quirk, the two stumbling and falling before them as he robbed them of their equilibrium. Rikiya was quick to follow up, draining them of their energy and leaving the two helpless before the change, Bakugou's hair sinking in as it became far shorter, his expression of rage calming as his transformation into Tengai settled, Overhaul providing him with a dark grey kimono and a brown beak mask. Kirishima however, despite his transformation finishing, shaggy light brown hair falling before his eyes and his muscles swelling enough to tear through his already ruined clothes, still found some strength to resist, attempting to use his new strong-arm quirk to beat Overhaul down. The yakuza simply recreated their originals battle, easily destroying and reforming him, his clothes now a white t-shirt, dark pants, a bule tunic around his waist, and a mask patterned like an orca, his hair flowing out the back, his fists now warped in leather and metal. He stood there for a moment before turning around and seeing overhaul gesturing him to follow, and Rappa give a quiet "shit..." before complying, the eight bullets complete.
Deku runs past several other class B members writhing on the floor, like Setsuna, whose body falls apart before sticking back together as her breasts deflate, the same as Kendo’s as her own pussy 'shlorps' out into a thick cock and balls, His hair Turning black in color. Finally groaning as he stands up, before he shouts at Deku and Eri to get back there, the two continuing their mad dash to find an exit, more once friendly faces getting in their way. Like monoma and a couple others that now don’t even look like their original selves, their clothes being the only tells at who they were before. Deku can feel his shirt growing wet from Eri’s cries of anguish, as he passes by Pony, Kinoko, and Reiko, their own breasts deflating as they cum out cocks, the organs flopping out of their own pussies. Pony’s hair turns brown, short and smooth, his horns sinking into his head, while Kinoko gains blonde wind-swept hair, his eyes no longer filled with x-shaped pupils, Reiko’s white hair staying white even as it shortened, the new man now far older than before, all three having grown larger and taller, the former Pony specifically towering over all of them. As Overhaul enters what was once the 1 B zone, he can spot the random goon who was once Kendo, and Yui who is writhing on the floor as her body transforms in much the same way, breasts flattening as they deflate, Cock and balls flopping out as he cums, and growing taller, larger, almost as big as Rappa. Kendo spots Overhaul and shouts. “Hey boss! I saw Deku running off towards the exit, carrying Eri on his shoulder!” He shouts, pointing in the direction Izuku ran, the yakuza boss moving to pursue. Meanwhile, Izuku runs past Ibara who is praying on her knees, her body obviously sweating from the pain, but she holds it together, even as her hair begins to fall out, the vines withering and dying on the floor around her, before growing a mass of mesy, purple dyed hair, black mascara forming under her eyes. While her breasts deflate and she cums out a thick, meaty cock, her mental changes coming in as she stops praying, before grinning as he begins to masturbate furiously, shouting out Praise Satan for this manly body. Deku was shocked by this drastic change and runs as fast as possible, activating full cowling, at long last finding the door outside.
A wall of spikes blocks his path, and he turns around to see the man he and Eri need to see the least right now. "Overhaul. I should have known." He says, putting Eri down and standing between the man and her. "What did you do to my classmates!" He demanded, still trying to think of a way out of this, or at least buy time for help to arrive. "I didn't do anything, Deku. Whatever this is must be that little brat's fault. But you already know that don't you? You're just trying to pin the blame on someone else. But I'm just as much a victim here as my new goons are, changed into far superior forms by her cursed power!" He declares choosing to ignore Setsuno grumbling that he'd rather still have tits and his own tiny sentiments with that thought, choosing instead to focus on Eri's sobbing and Deku's scowl... And the tiny bump that had started to grow on his left temple. "You're not going to use her to return everything to normal, are you." Deku asks, clearly knowing the answer before Overhaul laughs at him. "Ha! Nope, sorry. Old me would have, but I'm not her anymore, and I don't plan on turning back." He says, the remaining twenty-eight former students, now loyal yakuza thugs, exited from behind their leader and his squad. "You're the only one left Deku. But I wonder for how long. You've been holding the brat this whole time, wonder how you're going to turn out?" He said, before gesturing to his minions to attack, the goons charging at him. "Just so you know Midori-bro, I don't like this either. But I have no choice!" Rappa yelled as he and the rest of the bullets surged forth as well.
Deku glares as he puts Eri on his back to hold on. Activating one for all he begins to spark, punching the first goon Aka: Monoma in the face and sending him flying backwards, before he begins to jump around the room like a mad man. “My guess is You’re Kirishima!” Deku shouts at new Rappa as he lands in front of him. Before punching him hard in the chest knocking the wind out of him when he was distracted by the announcement of his old name. Running around, he fights off the goons, running at him one after another. The battle is tough especially thanks to these goons being smarter, knowing all his moves, and Eri not using her quirk on him to let him go full power, but honestly even if she did, he didn't know if he could bring himself to unleash that on his former friends. Plus, the fact that there is 1 of him and 39 of them. Not to mention that not helping his chances...
And so, the fight goes on, Overhaul continuing to reconstruct his goons fully healed, and for the rando's, in new outfits, the man once known as Ibara in particular screaming out a 'Bitchin'!' when he got his new ripped jeans and leather jacket, and Deku can feel his strength fading. He'd felt the tingle of Eri's quirk during the whole run, One for all shielding him from the changes. But know, being forced to use it like this he can tell that he isn't just getting tired, One for All getting weaker as he fights, the fight slowly changing against him as they got better at using their new bodies and powers. As he grabs 'Kendo's' goatee and headbutts him, he is suddenly blindsided by a Fused Overhaul punching him in the rib, a half concuss glance revealing he used Rappa to increase his striking power. As he fell, he knew he wouldn't be able to continue fighting, knew that he couldn't resist the change anymore, and so used his body to block their attacks against Eri one last time before he became one of her abusers, hoping that she'd at least remember that he didn't give up. At least that's what he thought would happen. Overhaul released the fusion, Rappa falling over and just let out a wheezing breath. "Can we never do that again? I feel like my whole body got ground to dust and put back together wrong." Rappa asked his boss, Overhaul responding with "And how do you think I feel? I have germaphobia now, do you think I like combining with someone?" Before he turned to face Deku, the last bastion of heroism in this place.
“I’m not going to let you hurt her again. She doesn’t deserve that, not again, not ever!” Deku shouts as he curls up over the small, shivering body underneath him, hearing her whimpers, her cries, it’s horrible, why does this have to happen to such a sweet girl!? Deku can feel One for All’s embers fading as the vestiges scream out before they are locked away in his mind, as he becomes practically quirkless once more, leaving him and Eri at the mercy of his former classmates. But still Deku refused to give up on them, holding out the belief that there is still some hope, some way, of this all being undone. It’s just locked away somewhere, and no one knows the key.
Chapter 2: True End.
Chapter Text
"How touching, Projecting on me your hate for the first Overhaul. But I'm sorry, dear sweet Ochako here has never hurt Eri before." Overhaul says, enjoying the looks of shock from the hero her once called friend, the sub human brat, and even his own gang. "But then, Ochako doesn't have hair this short or a fat rod between her legs, so I guess that means I'm not her. Just as I don't think your going to be Deku much longer." He finishes, Seeing the tell-tale bolts of Eri's quirk start to build on him. Deku sees it too, and he knows it's game over, and so he turns to Eri. "Please, close your eyes. I don't want you to see whatever happens." He asks gently, and she nods, both knowing that she wont be able to keep that promise. He backs away from her, and then he screams. His whole body feels like it's on fire, the power One for All had held at bay striking him all at once. His hair poured from his head and turned stark white, his muscles deflated as his spine curled, the scars on his hand and arm vanished were replaced by new ones. Unlike the everyone else, his clothes transformed with him, transforming into a dirty, short sleeved dress, his shoes disintegrating as bandages warped around his arms and legs, the bump on his head lengthening into a true horn. His eyes turned the same blood red as the girl he was becoming. Or so it seemed. Small breasts sucked in air to push themself out, rising the chest of his dress, and his loss of height stopped before her reached Eri's size. He moaned as his cock dumped his remaining sperm out, adding even more filth to her dirty clothes. As the changes stopped, she coughed, voice now high and childish, before looking at Eri with equally teary eyes, now looking like an older version of her. Like... her big sister. Izu- no Rei wiped her tears and stood, ignoring her sisters clothe unraveling to match her own, and turned around, planting her bare feet defiantly as she, with fear in her eyes, stood them down, her arms spread wide as she stood before the younger girl.
The tears stream down Rei’s large eyes as she glares at her former classmates. “I-I will not let you hurt her anymore! She’s already been through enough! Th-there must be a way we can fix this! P-please, stop this! I-I need your help! I’m not going to let my friends fall to the dark side!” Rei shouts at Overhaul and his goons he voice wobbly and less than Confident, but in her eyes every single one of them can see their former? Friend Deku, standing protectively in front of the little girl they themselves should have been protecting and caring for! How could they fall to such a simple trick like a body change and slight personality shift! Their memories were their own, the don't need to listen to these dark thoughts! If Deku could fight her obvious terror, than they could fight their own changes.
The 'yakuza' looked down in shame of their own weakness, at least one falling to his knees as self loathing took over. Overhaul stared, grasping his head as it surged in pain, he didn't know what to think. Before he can come to a conclusion, he takes a blow to the crotch that almost makes him a woman again, falling to his knees and clutching his dick, muttering "So that's what it feels like..." and looks up to see Rappa had launched the attack. "It's mostly for prides sake I did that... Anyway, since I beat you, I am no longer under your service. If you will excuse me." He said as he calmly walked towards the crying children, gently picking them up with one arm, before using the other to destroy the spikes that had blocked the exit before silently walking out the building, the rest watching for a moment before fallowing behind. Outside they were greeted by a field of rubble, the quakes causing huge damage to the school, and a small army of heroes gathering at the front. Seeing Eraserhead staring down the 'villains', Rei called out "Were fine Mr. Aizawa!", gently warping her arms around her traumatized little sister, and preparing for the longest explanation of all their lives, Overhaul mostly thinking if he could be pardoned for what just happened by helping fix the school.
It takes a while to explain everything to the teachers, and Detective Naoumasa was even called in to verify that the students were telling the truth. Overchako was assigned to rebuild the school in its entirety, but surprisingly enough Nezu tells him to leave the underground base that used to be the dorm rooms, deciding that the maze would prove useful later. Along with this, Nezu decides to mentor Rei as his new student thanks to her intelligence, and having One for all, even if the power was locked away within her, while Eri is adopted by Inko, making her Rei’s true little sister in every way. Eri is made to put more effort into her therapy in an attempt to prevent further incidents, along with the rest of the hero course students to try and help them overcome the new personalities, Ochako and Eri working together in an attempt to fix everyone with... varying levels of success, most of the students coming out well with some minor quirks. While some students came out better off than they were before. Thanks to most having both the new quirk, and their old quirks, upgrading their power levels to new heights.
Rei happily skipped down the halls of the tunnels, Eri following closely behind, hand in hand. The tunnels had undergone quite the transformation, the blank walls now dotted with paintings and plants and a soft yellow rug covering the floors. Rei wore her favorite outfit today, a green and red version of Eri's regular clothes, her short bob of white hair bouncing happily around her shoulders. She had tried to stay in school officially, but her general intellect rapidly decreased to that of the rather smart twelve year old she now was. Still, she wasent all that upset about this, she had a little sister now! And they were blood related too, not only in spirt like when she was De- Gosh darn it, she forgot again! Oh well, she'd just ask to be reminded again later anyways. A door suddenly opened in front of the sisters, revealing one of their most... troubling cases. Ibara had proven to be rather hard to revert, most of the others more or less back to normal with some suffering certain ticks, like Jiro's dramatically increased apatite, Bakugou's mood swinging between abject violence and calm serenity at random, or Todoroki 's newfound obsession with hard apple cider, but Ibara was a special case. Her body was stuck as intersex, and her mind flipped from her original religious persona, and that of the vulgar Satanist she had become that fateful day, at the drop of a hat, and right now she was in the latter mode judging by her outfit. Still, she walked past them with a small wave. the two little girls waving back before continuing to their destination, Overchako's room.
On the way they pass a large yellow caterpillar snoring in the hallway for some reason? 'Mr. Aizawa is weird' Rei thinks to herself as she giggles along with Eri as they look at the man before moving along, passing Kirishima. He was one of the few that had no issues and came out better in the end, thanks to him now being much stronger with his hardening, and Rappa’s quirk amplifying his offences, causing him to jump to being one of the most powerful students in the class, a powerful shield and spear. He smiles down at the two little girls waving. “Hey little dudettes! You going to see Ochako?” He asks and Rei nods “Yeah! We wanted to check on her! We're suposed to do work today!” Rei exclaims, Eri nodding behind her. “Well good luck!” Kirishima says before moving on down the hallway as the two girls head, on eventually reaching Ochako’s Room where Rei leads the way inside, pushing the door open with all the force her tiny arms can give. “Ochako! We’re here!”
Ochako was one that had remained mostly unchanged from her original self. Her hair was streaked with a darker brown and she had retained Overhaul's germaphobia, if to a lesser extent. She looked up and smiled at the two girls that had entered her room, pulling herself from her chair as she walked over too hug them. "Hey, how've you been? Not giving Ms. Inko any problems I hope." She asked the two, the little girls giggling as they shook their heads. "Good. How's your training going Rei?" Rei's smile turned to a grimace at her question. When she became Rei, she had been given the quirk that had been dubbed, Fast Forward, a functional opposite to Eri's Rewind. It was thought she could use it to return to her proper age, but every time she tried she got dramatically dumber, everyone hoping that this was just a side affect. Even Eri couldn't fix her, her body simply returning to the state she was transformed the first time. Ochako got the hint, and gently rubbed the preteens head, an unspoken promise that she'd get it one day, when the door opened again and Mina stepped through, apparently unsatisfied with her appearance, her skin not the right shade of pink, Eri and Ochako Quickly getting to work on trying to help make her more comfortable, Rei watching from the sidelines, so proud of her baby sister. She had made a lot of progress since that day, and Rei couldn't be happier for her, the trauma of the event almost gone from her mind. And if she still walked over to her bed some nights when she couldn't sleep, well, what are big sisters for?
Chapter 3: Alternative End.
Chapter Text
"How toutching, Projecting on me your hate for the first Overhaul. But I'm sorry, dear sweet Ochako here has never hurt Eri before." Overhaul says, enjoying the looks of shock from the hero her once called friend, the sub human brat, and even his own gang. "But then, Ochako doesn't have hair this short or a fat rod between her legs, so I guess that means I'm not her. Just as I don't think your going to be Deku much longer." He finishes, Seeing the tell-tale bolts of Eri's quirk start to build on him. Deku sees it too, and he knows it's game over, and so he turns to Eri. "Please, close your eyes. I don't want you to see whatever happens." He asks gently, and she nods, both knowing that she wont be able to keep that promise. He backs away from her, and then he screams. His whole body feels like it's on fire, the power One for All had held at bay striking him all at once. His hair poured from his head and turned stark white, his muscles deflated as his spine curled, the scars on his hand vanished. Unlike the others his clothes were not spared from the transformation, starting to split and brighten as the started to appear more as bandages then clothes, and the now noticeable weight of his horn made him understand who he was to become. Or so he thought. Instead of shrinking, parts of his body got bigger, his nipples, now poking through rapidly expanding holes in his shirt, did the inverse of what all the former girls did, sucking in air greedily to fuel an expansion of flesh into a pair of bouncy D-cups, several of the men getting visibly hard at the sight of his tits being framed by the bandages that surrounded them. His ass and hips got a similar treatment the flesh swealing rapidly into porn star proportions, his feet becoming dainty as his shoes became a pair of ankle bracers. His cock, now out in the open, was forced to cum and cum, his position insuring it all fell on a staring Eri, the organ retracting as he became a woman. Her face warped and crunched, lips expanding and covering in purple lipstick, eyes Becoming lidded as they turned red, thick eyeshadow covering their upper lids, her horn extending. Her screaming turned to moaning as knowledge seeped out of her mind, the once intelligent hero became dumber by the second, her simple mind barely able to remember her old life at all as she was finalized. her breathing slowed as she finished changing, looking like a far older, sluttyer Eri, and she looked around with vapid eyes before she spotted Overhaul, and she giggled dumbly. "Liek, hey daddy. I'm, liek, so totes sorry for trying to run away and stuff. If I, liek, bring the brat back, can Rei-Rei have some fucks? That would be sooooo much better than hanging out hear." She said, uncaring for the broken look in Eri's eyes.
Eri watches tears in her eye feeling like her world has fallen apart, the ne person that has always been their for her since they met now willingly giveing her back to Overhaul, and whats worse, Ocha's turned into Overhaul, Deku's turned into some dumb adult version of her, And all her new friends became people who hurt her before! What has she done! Her mind just cracks under the stress as she begins to scream out in horror, as her horn begins to spark once more. While next to Overhaul, Rei is smiling dumbly at him as he gapes a bit in surprise. This is one thing he never excepted to happen, Izuku turning into some adults bimbo version of Eri, and a memory surfaces in his mind as he remembers she has the opposite of Rewind, the quirk named Fast forward, letting her push things forward in time, When he hears the brat screaming he frowns in anger. “Rei go deal with the brat and I might give you the fucks you want.” He says to her, and she happily obliges, strutting over to Eri, her porn star hips swaying while her large ass bounces.
Rei stands before the pathetic brat, her own horn sparking purple before a bolt rushes off it and into Eri. Instantly her horn stops sparking, her body expanding as her age accelerated, her clothes ripping apart before turning into bandages identical to what Rei had. Within her broken mind something shifted, her memories of Ocha, Deku, all of her new friends becoming twisted as she watched a fake memory. Memory Ochako's kind smile turned vicious as she pulled off her wig to reveal short hair, as she pulled open her shirt and let the balloons within fly out. And memory Deku was much the same, tearing his face off to reveal it to be a mask, Rei's evil grin underneath. The rest did the same, revealing themselves to be in truth the members of the Shie Hassaikai, always had been. She had never escaped, her broken mind rationalized, they were just tricking her. She should just let go. Her will to fight died as eyes turned empty, her mind just as vapid as her sister, her very soul effectively dead. When the light stopped firing from Rei's horn, Eri seemed to be replaced by a second Rei, the only difference being her horn being on the other side of her head and that her lips and eyes were coated with gold. Rei turned to Overhaul, dumb smile on her face. "Did I, leik, do good daddy?" She asked him, Eri crawling towards him to paw at his crotch. Overhaul laughed and pated his sluts head. This was perfect! The brat wouldn't be running anymore! He spanked her bubbly ass for a job well done, the slut squealing in delight at the impact, before he created collars and leashes for the two, leading them back down into the darkness animals like them belong in, the rest of the reborn Shie Hassaikai following close behind.
Several months later, a supply of quirk erasers are being sold to villains to be used against the hero’s, while the hero commission buys the supply of antidote for the quirk erasers, a new battle against hero’s and villains happening on a daily. Everyone knew that the quirk erasers and antidotes coming from the same place however, none daring to try and raid their fortress, An area of land in the middle of Musutafu, Where UA high school existed, but is now no longer, the quakes toppling the structure and forcing them to move. The only thing that stood their today was a small, two story building, the maze of underground passageways that is the Shie Hassaikai base beneath it. Deep underground in the labs is a mass production facility, enormous amounts of clear white fluids pouring into two separate darts from massive pipes, the destroyer round production facility. The antidote is in a blue finned dart, while the quirk eraser is pouring into a red finned dart. The two pipes lead to a dark room with two black machines. The machines each have three large dildos. one of them having a vacuum like contraption meant to collect a female’s cum. On each machine is a girl, two porn star like females being fucked hard in each of their holes as they moan and cum, cumming almost every 10 seconds as they produce the fluids used to make the drugs. The one with the horn on her left temple makes the antidote, while the one with the horn on her right temple makes the eraser. The two sluts looking absolutely happy in their vapid eyes. A gold collar on Eri, while a purple collar is on Rei, the twins feeling like their lives are perfect, no even remembering their original lives in the slightest, the little they had long since fucked away by either the machines or their owners.
The machines shut down, the maximum amount of fluids reached for the moment, and the twins are relieved of duty for the day. Rei giggles as she walks over to her sister, clumsily helping her from the machine. Eri had never fully recovered from what had happened, her mind barely functional, and rarely speaking, so Rei helped her when their masters weren't there, as best as her own tiny brain could anyway, the dirty whore finally managed to get the equally filthy woman from the machine. The door slammed open then, and their minders for the day walked in, Fang, formally known as Kendo, and Azazel, once known as Ibara. Fang's quirk allowed him to project psychic energy arms that he could grow and shrink at will, the similarity to his old quirk making him one of the most competent members of the Shie Hassaikai, and their had been talks of him getting promoted, all his former classmates of team B cheering for him to be made official leader of the squad one day. Azazel, on the other hand could create little shadow minions, that he insisted were demons, that he could control. The two had been tasked with escorting the sluts for the day, a job they took with enthusiasm. As they walked the sluts, they suddenly stopped, before pulling down their pants to reveal their meaty cocks, the sluts sucking on them near instantly. While technically using the twins was only supposed to be an award for exemplary behavior, the twin yakuza hoes had no care for that, happily pleasing any cock they saw. They came in their mouths, wiping their dicks on the sluts faces after the pulled out and pulled their pants up, ready to bring them to the sowers before handing them off to the boss. The two were soon enough brought to the deepest part of the labyrinth, were Overhaul awaited.
He was sitting in his chair alone, idly swirling a liquid in a purple vile. This one was his own creation, not the original overhauls. It was created to replicate the effect that had altered the lives of everyone in the dorms that day, and would transform anyone it hit into a new member of the Shie Hassaikai, though he still couldn't figure out how to keep females as females with it, the only success ever being Rei herself. "Liek, Hi daddy! We're back from work!" Speak of the devil, Rei through herself at him, only being received by a slap in the face, animal that she is to him, her masochism greatly approving. He shook his head and had the two sluts sit at his sides, a business meting about to start with a new client. As they did, Overhaul took a moment to reflect, idly rubbing his cock through his pants, wondering if things could have been different. He shook his head, those thought were for some other time, no, those thoughts were for never! As Overhaul thought this, his cock suddenly gurgled, and than he felt the remnants of who he used to be, everything that made Ochaoku Uraraka who she was was, her hopes, her dreams, her memories, were turned into a single, fat nut that stained his pants, leaving only her care for her friends, no, his goons, behind as the rest of the girl vanished forever into a blob of yakuza cum. And Overhaul knew that every member of his Shie Hassaikai just had the same thing happen to them, the last remnants of who they used to be, the heroes they were, now nothing more than stains in their pants, just like those pathetic hero's should have been from the start, no longer holding back their true potential as the yakuza they were always meant to be, always were underneath. And Overhaul smiled, he didn't need... whoever he was before anymore, and none of his boys did ether! They were the Shie Hassaikai, and they were never going back! And so the rule of the Shie Hassaikai would go unimpeded, their conquest of the underworld complete and total. All thanks to the nightmare of one little girl.
Empire_Of_Despair on Chapter 3 Sun 10 Sep 2023 02:01AM UTC
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Peridece on Chapter 3 Sun 10 Sep 2023 02:03AM UTC
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Empire_Of_Despair on Chapter 3 Sun 10 Sep 2023 02:22AM UTC
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