This story was inspired by a certain doujin, you know the one. Anyway, I saw most of the Izuku harem fics were rather lackluster. A lot of them had Izuku as a "badass" instead of a "crybaby". Or they give him a quirk or make him succeed in several situation where he came in short. Or hell, they'll give him multiple quirks. (before that was canon) That just ain't my thing. I like Izuku just as he is. In fact, I like him a lot more than most Shonen protagonists.
This is a semi-dark drama that ends happy. Expect a lot more angst than a typical harem story.
Villainy comes in many shapes and forms and is birthed through many different circumstances. Its goals are varied, as are its desires. What makes a Villain villainous, is very often not their desires or goals, but their methods. What makes them a villain are the actions they take to attain their desires.
Seeking wealth, power, or pleasure are not sins. They drive many moral people to accomplish great things, just as much as they tempt and destroy the immoral. Wealth is needed by everyone; to live, to prosper, to provide for their loved ones. But by seeking wealth in the wrong ways, one might cheat or steal, or harm others in order to satisfy their own needs.
It is the same for power and pleasure. Seeking power may seem nefarious, but anyone who desires to change the world requires power to do so. All Might, the greatest of heroes has insurmountable power. And he has inspired many new heroes to take up the mantle thanks to his overwhelming power. Many who seek power do so because you cannot change the world if you are powerless. Still, there are those who seek power to lord it over others, to force others to do what they otherwise wouldn't. They seek power to indulge in their own ideologies at the expense of others. None encapsulate this quite as well as All Might's nemesis, All for One.
But then there is pleasure, of many different types. But primarily, sex is a driving force that has been present in humanity since its origins. This may seem sordid, and indecent, but the truth is that the species would not survive without lustful desire. And in actuality, it is not such a horrible thing to want. Man is a sexual creature. Man has been given hunger to be sated and has been given lust in much the same way. There are many who seek sex only, and they hurt many by their careless actions. But there are also those who seek sex with those they love, and to their betterment, they deepen the bond between them and their spouse.
But of course, there are those special hedonists that drown themselves in indecent pleasures and seek sex forcefully, without care to who they hurt. This story is about such a villain. A villain who seeks pleasure above all else. But what one intends for evil, can be turned to good.
But of course, even that which can eventually be turned to good can cause suffering and torment. Such is the case here for all those involved.
But especially for one Izuku Midoriya.
Izuku, also known by his Hero Name, Deku, was patrolling the streets as a way to get used to his provisional hero license. His good friends Uraraka and Yaoyorozu, also known as Uravity and Creati were also patrolling the same area. They were on the lookout for a certain low-tier villain that had been spotted in the area, who was known for sexual assault and indecency. No one knew what the person looked like, as they seemed able to change their appearance. And the description of him or her changed with each event.
It wasn't anything too egregious just yet, flashing people, groping women's breasts or men's genitals. Sometimes they targeted the underaged, though never the prepubescent. Whoever it was had appeared as a police officer, a construction worker, a teacher, a lawyer, and a prostitute.
"Uraraka, have you had any luck?" Deku asked over his radio headset.
"No, not yet. Though maybe that's a good thing."
Deku nodded, though of course his two partners couldn't see it.
"What about you two? Have you seen anything?" Uraraka said.
"No not yet," replied Momo. "But I have a lead. I was told there was suspicious comings and goings from a nearby building marked for demolition. Sending you guys the GPS coordinates now.
Izuku got out his phone and noted that the address was farthest from him, so that would mean that Ochaco and Momo would get there first. He hoped whoever it was wasn't too dangerous, because if so, they'd have to deal with him or her before he got there.
He smiled to himself as he realized that he was worrying over nothing. This wasn't some Nomu, and the League of Villains hadn't been seen since All for One's defeat. This was most likely just someone perverted with a shapeshifting quirk. There was very little chance that the person responsible for this was truly dangerous.
Deku had never felt more wrong in his life.
Within the building, an old brick thing covered in dust and cobwebs, Deku had entered to find the radio headsets of his two companions lying on the floor, destroyed. He immediately called for backup before getting into a fighting stance and charging in, ready to save Creati and Uravity from whatever villain had ambushed them.
He had found them just beyond the entryway, their wrists bound and arms behind their backs as they were lifted at least six feet up in the air buy a villain with a rather unique appearance.
He, or she, or really more of an it, was a large translucent purple slime in the vague shape of a human about 12 feet tall. The thing had no face on its head, and the shifting purple slime had branched out into two tentacles where the arms would be. The tentacles wrapped tightly around both heroines, both of them struggling in vain to get free.
This is bad! This is really really bad! What do I do?! What can I do?! There isn't any info on his quirk or how it works! If I just go in blind, I could be a hostage too… Maybe I can stall him until backup gets here… or… maybe…
Izuku's thoughts trailed off as the tendrils that bound his friends got tighter.
"Oh damn. It looks like I wasn't quick enough. Another one of you showed up. This hiding place is blown. Tch. Bad luck that."
The villain's voice was feminine, making Deku think the thing might be a woman, but it was hard to tell.
"L-let them go! There's already an entire team of Heroes on their way right now! Come quietly and you won't be harmed!"
The villain had no face, but it quirked its head in such a way that Deku thought it was sizing him up.
"That's a clever gambit. You're probably right. Under normal circumstances turning myself in at this point would be the smart thing to do… but these aren't normal circumstances are they, shorty? I happen to have two hostages. I don't know who you are or what you can do… but you don't know what I can do either, right? So here's what I propose. Sit back and relax. This situation is going to end well for me. It can end well for you too if you act smart."
The three heroes didn't like the sound of that. Ochaco saw that Izuku's faith in himself was wavering. She mustered what courage she had to inspire him. She hoped it would be enough. Deku was amazing when he wanted to be.
"Don't worry, Deku! I know you can beat him! I believe in you!"
The monster turned to her with its faceless head.
"Hey, I'm a woman you know. Although… what kind of relationship do you two have? That gives me an idea."
The villainess's tendrils grew smaller tendrils of their own and probed towards Momo and Ochaco's ears. They squirmed as the offending tendrils got closer.
"No! Stay away from me!" Creati shouted.
But her calls were unheeded.
The tendrils entered both Uravity and Creati's ears at the same time and both girls seemed to seize up. Izuku knew this was nothing good and so with speed, brought himself up to 5% power. Crackling with energy he sped forward like a bullet-
Only to be slapped aside by a slimy purple tentacle. Izuku looked up from his crumpled heap on the floor to find a dozen such tendrils had sprouted from her body as she continued whatever nefarious act she had begun.
Momo writhed in place, a terrified look on her face.
"Oh, oh god! Something's inside my head! I can feel it! It feels so strange! Please Deku, hurry!"
Ochaco was much the same, wriggling fiercely, trying to undo the slimy cuffs that were binding her hands from touching the villainess.
"It's so weird! Please hurry Deku! I can feel it in my brain!"
The villainess chuckled.
"Oh don't be silly, you can't feel things touching your brain. What you're feeling is me overriding several higher functions in the brain. In fact, you feeling anything means that I'm already..."
Deku got to his feet in a flash, but just as he barreled forward once more, ready to shear through the tentacles that had captured his friends, he was surprised to find that the villainess had… vanished.
"What? Where did she-?"
Ochaco and Momo were on the floor, moaning in pain.
"C-Creati! U-Uravity! Are you two okay?"
He ran over to them, concern in his eyes. He was curious where the villainess had went and thought she might have blended in with the floor. He wasn't sure what her quirk was exactly, but it stood to reason that it might be some kind of shapeshifting quirk. Her slimy flexible body seemed able to grow new tentacles, maybe she could become people and floors and walls too?
However, as he got closer, he noticed something off.
Ochaco got off the floor stretching her back, muttering to herself.
"This one seems to really like the green-haired boy… Izuku Midoriya. Oh she really loves her parents too, how sweet! And this body, it's so cute!"
Meanwhile, Momo was… fondling herself, playing with her rather large breasts.
"This body is so lewd! When I saw the outfit, I thought she'd be more perverted, but Momo Yaoyorozu is actually a completely innocent sweet cinnamon roll of a girl. How precious!"
"Hey that looks fun," Ochaco said, "Let me try!"
And then Ochaco walked over and began touching Momo's breasts.
Deku looked on horrified, as he realized what had happened.
She doesn't have a shapeshifting quirk! S-She has a-a body-snatching quirk!
Deku looked on horrified as his friends' bodies were being groped and molested against their will, unnatural smiles on both of their faces. He swallowed, trying to calm his nerves. He didn't know what he could do. His quirk wasn't able to do anything… and the backup… what if they ended up like Momo and Ochaco?
As he saw the two girls begin to paw at each other a bit more intimately, his breath caught in his throat. Momo's outfit was coming loose, and her breasts were nearly falling out. Ochaco was busy embracing the other girl with a smile that seemed sweet but felt sour as Izuku laid eyes on it.
"G-Give them back!"
The two stopped their exploring and looked over to him. At first, they seemed confused, but then they smiled at him. A horrible smile that made his skin crawl.
Ochaco spoke, it was her voice, but the way she spoke… didn't sound like her.
"Well of course, Izuku! I'll give them back… after I have my fun. Lots and lots of fun… I've never taken a hero before! I wonder what'll it feel like when I break this pussy in."
"D-don't you dare!"
Suddenly, Izuku found Ochaco wrapping her arms around him, and his face burned scarlet. Then He felt Momo come up and hug him from behind.
"Oh I'm not going to have them give their virginities to some random person, I'm not that cruel! I can be nice. They really admire you; you know… I think you'd be a great choice to have my fun with!"
Izuku's heart began beating rapidly at that statement, and his face flushed red. He stammered out in protest.
"T-T-That's… they should be free to do that with people they love! What you're doing is wrong! Please… just leave. I-If you do I promise we won't follow."
"Oh my, letting bad guys go free? That's not very heroic." Momo said.
"Yeah, that doesn't sound like something Deku would do! Have you been taken over by an evil villain?" Ochaco joined in the teasing.
Izuku trembled as the villainess occupying his friends' bodies began touching him, rubbing his back and his arms in overly familiar ways.
"Listen, Izuku. I really like you. I have ever since you saved me in the entrance exam." Ochaco placed a hand on his crotch. "So I wouldn't mind if… you know… if you took my virginity. In fact, I-I really want to- to be your girlfriend."
Deku swallowed hard as he tried in vain to stop blushing. He knew those words weren't Uraraka's.
"S-stop. That's not something Uraraka would say. I-I'm begging you, please leave. You can-" he swallowed again, trying to calm himself. "-you can hide in my body when our back-up comes."
Not-Ochaco smiled that strange smile he'd never seen on the real Ochaco.
"She might not have said it exactly like that, but she really does want to be your girlfriend. Really bad, might I add. She masturbates to the thought of you every other night. And you know, seeing her memories, I can see why. You're quite amazing Izuku. And that offer of yours… that's quite noble."
She grabbed his genitals firmly and got so close to his face he could feel her breath. Izuku trembled at the forced intimacy.
"But I can't actually take over men's bodies. So I'm afraid I'm sticking to the original plan. Here's what's going to happen, Izuku."
Momo grabbed his left arm, and Ochaco repositioned herself to his right. Momo took over speaking, a smile on her face that seemed almost like the real Momo's.
"When backup comes, you'll tell them I escaped. And then all three of us are going to go back to UA. Things will go back to normal, and you won't tell anyone. Because if you do…"
The two girls got close to him, unnatural smiles on their faces.
"We might kill ourselves."
No!
Izuku's face was contorted in horror as his two friends smiled devilishly at him, though they then stopped abruptly and got into relaxed positions, as if they were themselves again. Suddenly, bursting through the door in a flash of speed and power was Iida Tenya.
"Alright! I'm here! What's the problem, Deku?"
Izuku glanced at Ochaco and Momo, but neither one said anything, or acknowledged him.
"W-well, The villain… we saw them, but she got away."
Iida relaxed, as he realized that there was no fight to be had.
"I see, you three found out who's been assaulting people around here then? You said she? So it's a woman then. Curious."
Momo turned to the two with a determined expression that almost made Izuku think she had taken back control.
"Deku was very brave! Uravity and I were captured, and our radio head-sets destroyed. Deku came to our rescue!"
Tenya nodded and gave Izuku a thumbs up that Izuku did his best to match, not wanting to reveal the truth. He gave a false smile that seemed to put Tenya at ease. From behind the speedster, the two girls gave him a knowing smile, and Izuku trembled.
What was he going to do? What could he do? Could Aizawa sensei nullify this villain's quirk? No, probably not, it was a mutation type he was pretty sure. Or maybe he could? The slime part of the villain's body was a mutation, but this taking over bodies thing was something else. Of course, if Aizawa sensei couldn't see someone he couldn't nullify their quirk. Izuku wracked his mind for a solution but was unable to come up with anything.
"Deku, you look troubled. Was the villain so heinous?" Tenya asked.
"Ah, well… I was just, thinking."
Ochaco came over with a smile on her face that Izuku found hard to believe was false. The villain controlling her seemed to be able to imitate her victim's real personality rather well.
"Don't think too hard, Deku. The villain's gone for now. We know you like to analyze quirks, but this one might be better off reported. Pro-heroes need to take care of this one."
Momo nodded her head and grasped her fist in a confident gesture.
"This one's pretty slippery. We might be over our heads. We should let the pros take care of it."
Iida seemed to ponder their words, crossing his arms.
"What was her quirk? We might be able to deal with her. After all, its four on one, and with my quirk we can catch up quickly."
Izuku flicked his eyes towards Momo and Ochaco, though neither of them acknowledged it.
"W-well she was uh, a…" Izuku hesitated for a moment.
I need to play along for now so nothing happens to Yaoyorozu or Uraraka. I'll think of a way out of this before something bad happens. But for now… if I say anything. They might die.
"She had some kind of shapeshifting quirk, and slime quirk in one. It was similar to that villain that caught Kacchan all that time ago."
Tenya nodded, not doubting Izuku's words.
"Well there's nothing to it then. We'll report the incident and head back to the school. It's a good thing no one was hurt. We should be more careful in the future. Just because the crime seems lesser doesn't mean the culprit isn't dangerous."
Momo and Ochaco nodded their heads once and made to leave with Tenya. Izuku hesitated, not knowing if he should somehow get Tenya alone to let him know what happened. But a backwards glance from Not-Momo convinced him otherwise. That was not an expression that Yaoyorozu-san used. It sent shivers down Izuku's spine; the smile unnatural.
"You go ahead, Tenya, I want to say something to Deku." Momo said.
He nodded and left the building with Ochaco in tow. Izuku, nervous, but unwilling to do anything to harm his friends stayed still. As Not-Momo creeped forward, her gait became sultrier, her hips swaying completely unlike the real girl's personality. Izuku put on a brave face, trying not to seem as nervous as he was.
"You did well, Izuku. Very well. Keep it up, and your friends' bodies will be theirs again in no time. But just so you're not tempted..."
Momo lunged forward unexpectedly, catching Izuku off-guard. Before he could do anything, her arms were wrapped around him, pressing him into a tight hug. As Izuku struggled, believing this to be some kind of attack, he was kissed. Gentle but firm, Momo's lips touched his.
His eyes nearly bugged out of his skull, and his face burned red with embarrassment. But before he could do anything, he felt a wet squelch as something entered his ear. He pulled away in horror as he saw a slimy purple tentacle vanish from his peripheral vision.
"I know I said I couldn't control men. And that's true, to an extent. But I can still influence them a bit. That part of me will make sure you don't go blabbing to anyone. If you do-"
"-I'll rip your brain apart."
Izuku flinched at the voice that invaded his mind. It was the same feminine voice the villain had had before she had taken over his friends. Izuku remembered that when the villain had taken over Momo and Ochaco, she had commented on their memories. He pondered in fright if she could to the same to him. Would she find out his secret connection to All Might? Would she know about his mother, to threaten her in the future? He trembled in anticipation of further contact from the voice that was speaking directly to his brain.
But she said nothing.
Not-Momo smiled and tilted his chin up to her eyes, Izuku still shorter than his friend.
"Why are you trembling? Relax. I don't like killing. Just let me have my fun and everyone will be okay."
She caressed his cheek, which caused him to flush. It felt good, but he felt so awful at the same time. Could Momo still see and hear and feel while her body moved on its own? How did she feel about that kiss? Who was this stranger, playing with their lives?
"Who," Deku swallowed and steadied himself, trying to put on a brave face. "Who are you?"
"You want my name?"
Izuku shivered as he heard the voice inside his head again.
"Y-yeah. I just- I want to know who… who beat us." That wasn't actually true, but he wanted to know if the piece of the villain inside him could read his mind like it seemed to be able to do with Yaoyorozu and Uraraka.
"Well, I suppose that's fair. You can call me Brain-Jacker."
Izuku looked up to the smiling face of Momo as she extended a hand.
"C'mon Deku, Iida's waiting for us."
He took her hand.
The four of them left the area promptly and headed back towards UA with Tenya none the wiser to his comrades' predicament. Izuku was both impressed and discouraged by Brain-Jacker's ability to imitate his friends' personalities so well. When they returned to the school and reported to Aizawa sensei about the encounter, Izuku found he had no idea how to tell the truth of what happened without letting the nefarious villain know as well.
Momo Yaoyorozu, also known as Creati, was absolutely terrified as her body moved on its own, spoke on its own, and… kissed Midoriya on its own. She knew it had only been a kiss, but it had also been her first. His first too, she suspected. Though she had wondered if he and Uraraka-san had been involved, she felt rather confident from his blushing and stammering that was not the case. He acted far too innocent to be used to it.
She tried desperately to move her body, to speak and tell Tenya that she was not in control of herself. But it was useless. The villain, Brain-Jacker she had called herself, was in control.
"You ought to relax. Enjoy the ride. You're gonna have soooo much fun! Sex is great, you'll see."
The voice assaulted her mind again. She wanted to shiver, but she wasn't the one in control of that sort of thing.
You're a monster! Sex is a sacred thing! You shouldn't be doing this. Poor Midoriya looked horrified. I can only imagine what's going through his head.
"He's probably trying to stop thinking about how nice it was. You know I was going to get you to fuck Shoto… But I think you rather like Izuku. How's about it, Momo? Do you want to do a lot of naughty things with Izuku?"
Momo had no reaction to Brain-Jacker's words. She couldn't have any, actually. She couldn't blush, though she felt as if that's what she wanted to do. Her body was not her own, and even her thoughts were laid bare before the villain. She could see all her memories and had already embarrassed the poor girl several times. Momo was trying desperately to not give a reaction lest she stir the villain to act on her words.
But unbidden, thoughts of a blushing Izuku and herself both naked and embarrassed came to the forefront of her mind. She quickly dismissed the thought, but sadly as she had feared, the villain had seen it.
"Oho! So you do want to do naughty things~"
That's not true! I-I just… you made me think of that! You put it in my head! I don't want to do naughty things with Midoriya!
"What about Shoto?"
NO! I will wait until I am married! Like everyone should!
"Marriage, huh? Now there's a thought… I've never been married before. That could be fun."
Momo wasn't sure what the villain was implying.
"Maybe I'll have you propose to someone. Marry them first. You want to be married so bad, after all. I wonder who… Maybe some hobo. I'll bet if I could find one, he'd say yes."
Momo did her best not to react, feeling that if she showed how horrified she was at that statement that it might prompt Brain-Jacker to do it. However, her mind was an open book, and the nefarious villain chuckled at Momo's fears.
"Oh you are too much fun. I can't wait until tonight when you and Ochaco show Izuku a good time. I'm going to enjoy this a lot! I should have Brain-Jacked a hero way before now."
Momo wanted to cry, but instead her face was smiling and silently giggling, controlled entirely by the invasive presence that held her captive. They had arrived back at UA, and Tenya was leaving with Midoriya to report to Aizawa. Momo watched on as her body waved to Midoriya and winked at him, forcing a blush to his face as he plodded off, eyes downcast.
Izuku was quickly figuring out how Brain-Jacker's quirk worked through careful observation. Though sadly, he couldn't think of a way to write it down without alerting the villainess. So far, he had found out a few things. She could control women's bodies and read their minds. She had to be physically present within their bodies to do any of that though. He wasn't sure if she was actually in contact with their brains, or somehow melding with their nervous system. There was no way of knowing.
What was curious is she couldn't control men, at least, not as much as women. She could still enter their bodies and from what Izuku could surmise, alter the body in small subtle ways. He had figured it out on the way back to UA, she was…increasing his libido. It wasn't hard to figure out, considering how terrified he was, he shouldn't be feeling the way he was, but every time he looked at Uraraka or Yaoyorozu his body reacted completely inappropriately.
But besides that, he had also figured out she couldn't read the minds of men she inhabited like she could with women. If she could, he had no doubt she would have reacted to his plans. However, there was one thing he couldn't figure out, and it was instrumental to finding out how to get free of her.
Could her copies communicate telepathically, did she have a hivemind? Were the divisions of her body extensions of her consciousness, or did they act like clones? He had no idea.
Mr. Aizawa seemed more tired than usual as Tenya relayed what had happened. Or at least, what he knew of it. When he was done, Aizawa seemed to catch that there was more going on and asked Izuku to stay.
"Midoriya, do you want to say what happened? Tenya didn't have many details."
"Ah, w-well. Ah… n-nothing much."
Aizawa quirked an eyebrow, not believing Izuku for a second.
"Tell me anyway."
Izuku could almost feel Brain-Jacker squeeze his brain, daring him to even hint at the villainess's existence. With a deep breath, Izuku steadied himself and lied. He felt awful, lying to Aizawa sensei. But at the same time, he couldn't risk his friends' lives. He would tell his teacher… eventually. When he figured out how to do so without alerting Brain-jacker.
"Well… the villain, she can uh… shapeshift, just like Iida said. But she uh…" He could feel the headache become worse. She thought he was actually going to say something. He clutched his head in pain.
"She turned into a naked Uraraka. I-It really freaked me out, sensei."
Aizawa nodded, seemingly taking Izuku's word at face value.
"I see. So, this is definitely the culprit that's been sexually assaulting people. They seem to have a powerful quirk, but little ambition. Still, it might be best to let the Pros handle it. I'll find a smaller crime for you all to handle. Remember, this is to get your feet wet for your work studies. But they're real criminals. Don't bite off more than you can chew."
Though Aizawa gestured that the meeting was over, Izuku still had something on his mind. Primarily, he wondered why UA was sending second year students to deal with criminals. Especially before their internships.
"Um, Aizawa sensei?"
"Hm? What? Something else?"
"Uh… yeah. Kind of. I was just wondering… why are we being sent on these 'villain round-ups'?"
Aizawa stared at Izuku with a blank stare that made not just Izuku uncomfortable, but also seemed to unnerve Brain-Jacker.
"I thought it was obvious. But I can spell it out for you. Despite the efforts of the Pro Heroes, ever since All Might's retirement, crime has been going up. Criminals aren't intimidated like they used to be. They feel as if it's open season. Despite our best efforts, and record-breaking arrests… crime is still going up. Even small things like shoplifting, or indecent exposure, are becoming more and more common. To put it plainly, there aren't enough pro-heroes to deal with it all. We're allowing you to participate in the work studies program early, but we think it might be a good idea to get you used to the idea of dealing with actual criminals. Or at least the government does. They're letting small excursions occur and seeing the results. They think if the crime is on the lower end of things, you might be able to handle it.
"However, not all low-level crimes are committed by low-level villains. This one you were in contact with seems like it might be trouble, which is why we're moving it to the Pros. Don't worry too much about it."
"That makes sense."
Izuku ignored the intrusive thought. Instead, he thanked his sensei and went back to his dorm. He needed to think of a way to deal with Brain-Jacker.
He now knew something that the other Brain-Jacker's in Uraraka and Yaoyorozu didn't. He would be able to discern if they shared a mental link. He gripped his fist in determination.
I'll save you two! I promise! Please hold on Uraraka, Yaoyorozu!