Chapter 89
by
DeviantDiscovery
What happens next?
MBA Side Story: Keiko's Change
(This is a MBA side story! A shorter branch following one or more citizens as they experience the effects happening in the story at this time. These are canon, but most of the time they won't really have any impact on the main story, so you don't have to read them to understand anything. Hope you enjoy!)
If you'd like to join the MBA discord as well, here's a link. You can talk with others about the story or ask me questions about upcoming stuff, really just come hang out!: https://discord.gg/VCeJvfAPXa
"Mhmm..." Keiko grumbles to herself, still **** as she sleeps at her desk. She spent all night playing games and scrolling the internet, as she always does. While usually she's able to make it to her bed, last night she didn't bother. Instead, her keyboard is pushed to the side as she uses her arms as a headrest, slumped forward lazily.
As she sleeps, the afternoon sun pours into the room through her curtains. She had been up until sunrise, her usual cycle. Outside is as normal as it ever is, until suddenly a loud crash can be heard. Immediately, Keiko is jolted awake as her eyes fly open.
"Wha- huh?" She starts, sitting up. For a moment, there's just silence until another sound makes its way up the tall building once again. "Is that...?" She reaches a hand up, still half asleep as she rubs her head, her messy black hair falling over her eyes as she's **** to move it out of the way. Standing up now, she stretches, her attention fully focused on the sounds from the street below. They almost sound like a fight...

The strap of her tanktop hangs loosely, something she doesn't really care about as she lounges about her apartment. She doesn't bother to adjust it as she moves to the window. Taking each step carefully, she peaks out, looking all the way down to the street below. She's pretty high up, but squinting, she can see a figure, a massive one with green hair, leaping after what looks to be... is that Mirko? Keiko tilts her head, watching as the Rabbit heroine flees on the rooftops, leaving the muscular green haired woman behind. The sight is odd and enough of a shock to wake her up more.
Thinking a bit more clearly, Keiko realizes this might be serious and looks to her phone. Grabbing it off the messy desk and typing in the number, she calls the police. Immediately, they pick up.
"Hello? Yes, I want to report a crime, I think? I just saw the hero Mirko outside my apartment, fighting someone else... Yes the villain is still here. What is she doing? Well, nothing now, she's just walking and... wait... did she just do something to that car?" Keiko gives the details over the phone, watching as the hulking amazon below saunters over to a car, before changing it with her power. Keiko's eyes go wide as she realizes what just happened, before a look of fear adorns her face as the woman kneels down, her body beginning to glow pink as she touches the road.
"Yes, she's uh..." Keiko continues. "Touching the road and glowing pink... is that supposed to be happening-" Her words grow more unsure, until suddenly a pink pillar of light shoots up into the sky, whizzing just in front of the window, causing Keiko to shriek and stumble back. "Ah!" She shouts, tripping over herself as she falls back onto the bed.
"What's happening?" The responder over the phone asks before the connection cuts off. Keiko is shocked, her eyes wide as she looks outside. Before her, a pink dome covers the whole city block, the sky being tinted through it, and her room flooding with the same shade as its light pours in. Keiko forgets her phone as she props herself up with her elbows, looking out at the pink light before her. For just a moment, it looks horrifying, until suddenly everything grows fuzzy.
The immense energy begins its work. Down below, Izumi Midoriya floods the area with her power, transforming it in her image. All around her, buildings shift and alter their shape, along with the people inside them...
Keiko gasps, suddenly feeling a powerful heat wash through her. It's intense, really fucking intense... It's so much that she feels like she's gonna pass out. Closing her eyes tightly, she groans as the room around her, along with her own body shifts. Fueled by the desire of Izumi, the energy twists her den of lonely despair into one straight out of a teenage boy's fantasy. The mess vanishes, every corner of the room being cleaned in an instant. immediately after, the actual contents shift too, the darker and more boring colors making way for bright pink and purple. Even Keiko's old beaten up chair alters, becoming a sleek purple gaming chair complete with cat ears on the top.
If she saw what was happening, it might've distracted her from her own changes, but with her eyes tightly shut, all she can do is experience them firsthand. It starts with her hair, the messy matte of black strands beginning to lengthen. Her locks grow silkier as they shoot down her back. She feels them behind her, each hair sprawling out onto her now silk sheets. Next, the growing woman practically moans as her body alters. Just as Izumi wants, her breasts, something Keiko never particularly cared about, balloon out. They stretch her tank top, as they grow a cup size... then two... then three... "Fffuucckk!" She cries out. It should hurt, her skin stretching like that, but it doesn't. Instead her cries turn into moans as the feeling becomes pleasurable.
In moments, her average body becomes that of a goddess. She grips the sheets beneath her, her nails lengthening and taking on the same pink color as the rest of her room. Her lips plump, changing the sound of her voice leaving through them, her voice suddenly more breathy and seductive.
Finally, Keiko's eyes shoot open, no longer their dull grey, but instead a vibrant fuchsia, as she sees her new room for the first time. Though at the moment, she can't think.. the bimbofying energy alters her mind, forcing it's way into her thanks to the immense energy Izumi has **** into the surrounding area. She has **** but to accept it, and accept it she does. As the transformation completes, Keiko is left breathing heavy, her eyes wide as she looks to the ceiling. It takes a few moments to process everything, but when she's finally able to think again, she sits up.
Everything feels off... yet natural at the same time... "Huuuuhhh..." She breathes slowly, looking down at her chest. "Like, when did these get so..." She reaches up, giving her newly enlarged rack an experimental squeeze. "Oh fuck~" She moans, surprised at how sensitive they are.
It's only been a minute or so, and suddenly all she wants to do is squeeze her tits. Just that little touch felt so good, but despite the new urge, she still feels cramped... So she stands, pushing herself off the plush bed she stretches, looking around her room in the process. "Ooh... what happened...?" She asks quietly.

Small bits of pink electricity still crackle in her room, the leftover energy from Izumi's takeover. She watches them dance about, the excess magic slowly fading as everything settles. She tries to make sense of it, but her mind feels so foggy, instead she can only focus on how pretty it all looks. After a moment, she cocks her hip to the side, a smile spreading across her face. "So cute..." She mutters, her newly bimbofied mind ready to accept this all, even the dildos that lay next to her bed, as if they're something completely normal to keep out in the open.
The wild events and fear she felt just moments ago are forgotten as Keiko continues her exploration of her body. Absentmindedly, she runs her hands down, roaming over her newly minted bimbo outfit, and down to her hips. "Holy shit..." She breathes, looking down. Catching her attention for the first time, she sees her hips... and thighs... and... "Fuck!" She cups her ass in her hands. "It's huge!"
Excitement welling up inside her at her new bottom heavy transformation. She's ready to go all in and experiment with the new her. With a giggle, Keiko uses a thumb to expertly lift her top, revealing her new tits, before suddenly a sound catches her attention behind her. She turns to see a man... a big man, bulky and muscular, and not wearing a thing... standing in the doorway to her room.
"Who are you?" She asks, her eyes glued to his erection immediately.
Also unable to look her in the eye, the man grins, grabbing his cock as he thinks of everything he wants to do to her. "I uh... just saw the sign in the hall, said you were open?"
"Open?" Keiko asks, tilting her head.
Neither fully understand the process yet, but they both are fully ready to go along with it. Outside, a new system has been set up, fully implemented in the change Izumi made to the local area. Signs lined up in every corner of the building showing the names of all the tenants, and whether they're occupied with someone or not, showing anyone nearby if there's a lonely slut or stud they can walk in on and join.
It only takes a few seconds of trying to converse, before the two's desires take over. The man walks fully inside, the door shutting behind him, as Keiko continues her strip, a ditzy smile adorning her plump lips as she wiggles her shorts down her massive thighs.
Minutes later, the bimbo is on her back, the man positioning himself over her as he rams himself between her legs. Keiko moans out, seeing stars as her virginity is taken in the best way possible. "Fuck! So gooood~"
Outside, the sign with her name on it flips over, stating "occupied", along with a growing number of tenant's rooms following suit.
Keiko's Transformation Level: 3/3
Epilogue?
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My Bimbo Academia
A mass bimbofication story
Shortly after her debut, low level villainess "D-Stress" finds herself in a fight with a UA student. From there, the strange effects of the villain's quirk begins to manifest itself within her adversary, who then unknowingly passes it on to others, starting a ravenous and exponentially growing cycle.
Updated on Feb 14, 2026
by DeviantDiscovery
Created on Feb 20, 2024
by DeviantDiscovery
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