[Expansion, Impregnation]

"Come on! Is that all you've got? You're supposed to be the big bad leader, and you can't kill a measly little rabbit?"

"And who's the one getting winded, Hero..? You've been jumping around while trying to deal with my Nomu, you're going to run out of energy far before you manage to land a killing blow on me."

"I don't need to kill you. I just need to get rid of your forces or stall you out until the others get here. And since we've already dealt with that 'friend' of yours, you're not going to get away this time!"

There was chaos all around the city. All thanks to the League of Villains going all out and targeting as many innocents as they possibly could. They had waited long enough, and now they were going on the offensive. Whether by using their various members and their specialized powers, or the mass produced Nomu that were more than happy to just destroy anything as long as they got to run rampant.

And while many of the Pro Heroes had not yet arrived to deal with the onslaught, one had. Usagiyama Rumi, otherwise known as the Rabbit Hero Mirko. Thanks to her excellent athleticism, she had sprung into action and single handedly turned the tide. And while she couldn't focus on all of the lesser villains that were causing problems, she could focus on the big wig himself.

Tomura Shigaraki. The leader of the League of Villains, who was more than equipped to destroy anything that he touched. As long as all five of his fingertips made full contact, the thing he touched would start to decay. And while that was certainly a strong power in isolation, against an enemy that he couldn't grab so easily... Well, he wasn't exactly enjoying the experience of fighting a bunny that just outpaced him.

Which was why he had brought all of those Nomu. Not just to cause chaos and destruction, but also to ensure that he could fight against anybody that got in his way. And judging by the way that the tanned bunny was starting to sweat, it was clear that-

"You're slipping, Villain!" As Shigaraki was busy trying to plan out the way that he was going to capture of deal with the bunny that had been forcing him on the defensive, he was suddenly dealt a rough and powerful kick to his side, launching him far away while Mirko grinned from ear to ear at the sight of her own strength.

Two of the lesser Nomu that were equipped with rudimentary muscle-strengthening Quirks fell just as quickly as their master had been launched, as Mirko bent over and spun around with incredible speed as she stood on top of her hands, jumping back up once both had been knocked aside. The young man didn't have many of those things left, at least according to what intel that she had. Well, what kind of Villain would have more than a hundred special soldiers stocked up anyway?

"Is that all you've got, big shot?" Mirko wiped her hands as she got closer to the wall that she had inadvertently knocked Shigaraki through. "You really aren't that much harder to deal with than one of your minions. You really think you're a big shot if that's how little it takes to deal with you?"

Shigaraki pulled himself out of the wall, the hand on his face currently serving to hide away his eyes. But you could feel the hatred radiating off him, especially as he snapped his fingers. "Kill her!" He shouted, as the wall burst open to reveal several larger and much tankier looking Nomu...

Mirko laughed at the sight. He was just going to resort to bigger and badder minions without proving himself a threat. Which meant that she could just do what she had been doing. Crushing them like they were junk and then knocking them aside...

One. Two. Three. Four. Each of the Nomu were given a devastating blow to one of their weak points. Or rather, it seemed like she had struck a weak point with how quickly they crumpled, but judging by the steam that seemed to blow off Mirko's extra thick leg, it was probably just her kicks that were that devastating...

The last of the four Nomu fell by having her crash her heel down on its exposed brain, with her standing on top of its knocked out body after the fact. And from this position, she could just sway her hips a little as she walked closer, wrapping her arms underneath her breasts as she smirked. "You really aren't going to win if you just keep throwing these guys at me. I've learned how to fight them, and they're nothing more than a distraction. So come on, big shot. Give me everything you've got."

Shigaraki was beyond furious as he looked at her. This single Pro Hero had undone much of his prep work. And now there were only a few specialized Nomu left for him to rely upon, as well as his own power. "You..!" He shouted, abandoning his self preservation for but a single moment. All so he could launch at her and grab her with those dangerous fingers.

But he didn't succeed. All that he earned from that was a swift kick to the back of his hand, and having his head trapped momentarily between her thighs. "You know, a boy like you could do with a bit of action. Maybe that's how I'll help rehabilitate you, once you've answered for your crimes." She teased him, laughing as she tossed him away moments after trapping him like that. She wasn't going to afford him the chance of touching her. Even when she was teasing him like that.

Shigaraki slowly got up after being launched away like that. His body aching and his mind screaming in frustration. A feeling that certainly wasn't suppressed as he saw that overly dominant and teasing bunny licking her lips and stroking away at the air. She was... She was taunting him and his cause. Making it seem like he did all because he was bothered by his hormonal urges...

...There was one way that he could beat her. There was a particular Nomu that the Doctor had given him command of. One that was only to be used in utmost emergencies. Not because it was fragile or particularly strong, but because it would essentially bond to the first enemy that it struck. And from there, it would be able to replenish their forces. Of course, that was the very impassioned way of describing what it was made to do, but the particulars didn't matter in the moment. What mattered was how it would help him.

"You... You think you're going to win, don't you, Hero..?" Shigaraki panted as he slowly brought his fingers up once more. "Well, you shouldn't be so sure. You've still got a long way to go before you've put an end to me... Or an end to all the Villains like me that loathe your kind..!"

Mirko rolled her eyes. Typical hormonal teenager. She definitely needed to show him a good time once all of this was over and done with. Then he could probably figure out that what he was doing wasn't the right thing to do. And from there... Well, maybe he could use that power for good.

While she dwelled on what she was going to do with the boy once she had beaten him, a rather large looking Nomu emerged from behind the leader of the League of Villains. A Nomu that was about three times the size of the boy, with enough bulk to match. Unlike all the Nomu that she had curbstomped or destroyed with a couple of kicks, this one seemed a bit tougher. especially as a set of tendrils started to whip around from behind it...

"Mmm? What's so special about this one? Think it can handle me with those?" Mirko grinned as she gently stroked the air once more. "Maybe I'll show you what I do to boys like you, once I've knocked it to the ground." She chimed, all while leaping straight ahead towards the overly muscled minion.

The Nomu responded in turn by letting its tendrils shoot out, each whipping around in a frenzy to try and slam into her. And the ones that weren't whipping around semi-randomly were currently trying to just grab her and restrain her. A pointed and direct kind of attack, as well as ones that covered an area. The perfect kind of defense...

Against anybody that wasn't her. Mirko would be a lot harder to deal with, as she simply kicked the tendrils out of the way. Every kick allowed her to disorient the Nomu more and more. It probably wasn't used to having its appendages damaged, because nobody would think to attack them directly instead of just trying to cut them off and avoid dealing with them.

"Doesn't seem like it's anything special, big shot!" Mirko laughed as she got closer and closer, with her foot ready to come crashing down on that exposed brain and-

A powerful shock started to pulse through her. Not one of pain, but one of intense pleasure. It was like... It was like she had just been fucked so tenderly that she was about to be impregnated. At least, that's the kind of feeling that was rushing through her. And thanks to how sudden it was, she couldn't stop herself from moaning, nor could she keep her concentration...

Thanks to how she had lost her concentration at that critical moment, Mirko was slapped aside just as she had done to Shigaraki. All while she felt her skin heating up and her cheeks flushing red. What was this feeling inside her? She didn't like it. She really didn't like it...

"Looks like you're finally starting to realize what you're up against, Hero..." Shigaraki said, grinning as he slowly collected a bit of juice from the ground. Panting and gasping a bit himself as it absorbed into his skin, with the front of his pants starting to tent. "This Nomu isn't just meant for combat... It's meant to disable heroes like you. All so that it can make up for all the brothers that it has lost."

"What..?" Mirko muttered as she slowly forced herself back on her feet. Panting and gasping as she felt that heat pulse through her. So if what he was saying was true, then it had forced her into heat? But that shouldn't be possible, she was... Okay, she was partly an animal, so it did make a little sense. Still, she shouldn't be able to do so without finding a proper mate. She wasn't even in the right season!

But the Nomu didn't seem to care what she thought. Not as its extremely disgusting grin widened and it let its tendrils whip out violently. Whether to try and strike her like it had done before, or to cover her in the same kind of liquid that had forced her to get this horny. Either way, it was going to win.

"Heh, you think a little arousal's going to stop me?" Mirko cried out as she launched herself at the Nomu once more. Not bothered by the juices pouring onto her this time, no matter how much they aroused her once they melded with her body. Even though her pussy was throbbing, even though it was begging to be skewered... She was still in control. "I've trained while I was suffering from heats worse than these! I even trained under the threat of pregnancy! You're not going to deal with me just because-"

In the midst of her taunting, she suddenly noticed a spike force its way out of one of the tiny bumps on the Nomu's body. And she barely managed to dodge it, with only a mild bit of it managing to make an impact. All while she panted and gasped, the sensation of something so sharp rubbing up against her serving to fill her with an even greater need...

At least she wasn't in direct range of its attacks this time. She managed to jump out of the way, even if she couldn't exactly keep her footing. It was like she was getting dizzier by the second. Like something was overwhelming her, like she was... lopsided...

Slowly but surely, Mirko looked down. And she noticed where that sense of lopsided imbalance came from. Where she had been nicked by that strange stinger, there was a distinct sense of growth. Or rather, the spot where her thigh had been struck was currently inflated. A much bigger and thicker thigh than it needed to be. That was why she felt this way. Because she genuinely was imbalanced...

"You really thought that it could only disable you in one way, didn't you, Hero?" Shigaraki grinned as he stepped closer. All while his loyal and freakish minion approached as well. "This thing has been made with the sole purpose of disabling a Hero like you. And once you've fallen victim to everything that it can possibly do, then... Then.... Ehehehehehe..." The villainous youth cried out, his elaborating turning into crazed laughter. He was as insane as ever...

"Big deal! So what if my thigh's a bit bigger than it needs to be!?" Mirko shouted as she leapt into action again. She would be able to compensate for the way that her body had been messed up. All she needed to do was account for the mild change in jump arc, and then-

At least, that's what she had thought. But as soon as she landed after jumping forward so aggressively, her thigh started to tremble and radiate the same kind of heat that the liquid that merged with her had. She was being turned on, entirely because her thigh felt even the slightest bit of stimuli. It wasn't fair, and yet she knew that it absolutely wasn't made to be.

Shigaraki continued to laugh as his Nomu took advantage of her paralyzed self, launching more of those stinger-like projectiles. Most of them flying in the completely wrong direction as they were utterly impractical at range. But one of them was pointed in just the right direction, the tip aimed squarely at Mirko's other thigh.

And it made impact. Mirko let out a mixture of a moan and a groan as it practically sank right into her. Merging with her, just like the arousing juices had. And almost immediately her thigh started to inflate to the point where it was as obnoxiously thick as the other one, with both looking like they could wobble around at any moment. It wasn't like she had gotten fat, but her body was definitely a lot bouncier in the worst way possible.

"What's the matter? Can't dodge?" Shigaraki laughed even more as the Nomu crept closer and closer. "If you don't hurry, Hero, you'll be left as nothing more than a factory for the next generation of Nomu! I'm sure that you'd want to die if you suffered that humiliation first hand!" He taunted, raving and ranting the longer he was allowed to remain in control...

She certainly tried. But the feeling in her thighs, that heat that radiated through her the more she tried to focus on it, meant that she couldn't get away. All she could do was stare straight ahead as it got closer. All while her heart sank further and further. She didn't want to lose this way. All she had to do was make her legs work, and... and...

Mirko's nose picked up on a thick scent. It wasn't the thick scent of the liquid all over the ground below, that one she had come to ignore due to the fact that it was bringing her to a boiling point arousal wise. No, the smell that was wafting through the air at the moment wasn't like that. It was thicker. Manlier. It made her thighs try to pinch together, all while... All while...

"W-What's... What's happening..." The Rabbit Hero muttered as she felt her pussy drooling out so much juice that it was actively causing her to fall onto her knees. All while the Nomu crept closer and closer, grinning more and more with every step it took... And as it did so, the smell just grew stronger and stronger.

It was its scent. More specifically, it was the animalistic musk that leaking off it. It was strong enough to make an Animal-type Hero like her fall onto her knees. It was almost enough to force her to play with herself too, all while she panted and gasped and looked straight towards that featureless crotch. How cruel. It forced her to get this horny, and yet it didn't have anything that she could-

A sharp pain and subsequent pleasure forced its way through her while she was distracted by her instincts and need to breed, all thanks to the stringers that had been fired off sinking into her once again. Now that it was a lot closer, landing hits on her more intimate areas was a lot easier. It was why there were currently stingers barely sticking out of her breasts and her ass, with the stingers slowly sinking in to allow for them to be incorporated into her body.

Mirko tried to fight back against the sensation that came with being filled like this. But she couldn't fight back. Not while she was being overwhelmed by everything. Not while her thighs were trembling so badly that she just wanted a cock to smash into her. So of course she couldn't stop the growth from happening, especially not as it started to strain against her uniform..!

A sharp moan and a frighteningly loud tearing sound echoed out through the air. And when it finished, her uniform had been turned  to tatters, while a massive set of milkers were now hanging off her chest and a dangerously large set of buttocks were clapping right behind her. Both had increased in size by several factors, and now... Well, she looked more like she was ready to star in an adult film rather than fight crime and deal with Villains...

"Now that's a much better look for you, Hero." Shigaraki was now the one who controlled their little encounter. Especially as he could taunt her and degrade her, his vile grin poking out from the sides of the hand on his face. "Or should I call you Sow? You're not going to be doing much besides breeding shortly, after all..."

Mirko trembled as she tried to cover up her assets. But by the time she did so, the massive Nomu had already gotten all the way over to where she was. Her eyes were staring straight up at it, and she felt her body growing weaker. Not because she was weaker, it was just her perception of herself that was being ruined by the musk...

And then it dealt her another fatal blow. All by having a slot open on its crotch, with a massive cock popping out right then and there. A massive equine length that it had managed to keep safely tucked inside. It was... It was almost as big as her. And just looking at it made her drool and tremble. She... She wasn't expect to take that thing inside her, was she?

Mirko didn't get a chance to question what was going to happen to her. Not when the Nomu could easily pick her up by the thighs, letting her arms dangle while holding her upside down... Before then doing what it was made to do. It slammed straight into the tiny hole between her enormous thighs, penetrating her and ensuring that an intimate bond started to form.

Oh, she hated this. But at the same time, she couldn't admit that hate. Not after all of those fingers pressed against her tender flesh. It was like... It was like, as soon as it had managed to touch her, that something went off inside of her brain. It was like an explosion of instincts that overwhelmed her capacity to think. Her capacity to fight back. All while grabbing the reins of her body and forcing her to accept that cock. It was the only reason why being penetrated by such an oversized cock didn't hurt.

In fact, it felt downright heavenly. Mirko's eyes rolled into the back of her head while her body convulsed ever slightly. Completely consumed by a need to breed, all while it seemed like she was little more than a cocksleeve. She didn't understand what the Nomu had done to her, nor did she truly care. Right now, she just needed to breed. Breed, breed, BREEEEEEED!

Shigaraki laughed as he watched the Hero get reduced to nothing more than a body to be bred. How the oversized minion used her as a practical toy, using her hips as leverage while it made short work of her pussy and the wall that led into her womb. Bulging her out completely. It was a sight that served to delight him beyond comparison. This was the only thing a Hero was good for, after all...

The Nomu was doing exactly what it was made to do. Once it had disabled a Hero thoroughly using its various quirks, it was given a single directive. Breed, breed and breed. It needed to knock up the Hero that it was partnered with. No matter if she wanted to be bred or not. Her feelings did not factor into its objective, nor did it have the capacity to care if she was going to be hurt or not.

But all of the quirks that were pumped into it also ensured that the breeder that it was paired with wouldn't be hurt. That was why her tits had been enlarged in such a fashion. It was why she was beyond horny to the point where she wouldn't feel any pain. And it was why her thighs and her hips and her butt had all grown to the point where they were more like an extended set of cushions rather than anything that the breeder would actually try to use herself.

Indeed, the more that the enormous equine-shaped length smashed into her, the more Mirko was being affected by all of the quirks that were available to the Nomu. Her breasts were growing bigger and bigger, growing far beyond the size of her head as they looked less like individual breasts and more like a massive set of udders, complete with both nipples popping out of their inverted holes and leaking milk that sprayed around haphazardly the more that the Nomu fucked her. And her other assets grew as well, especially as those massive and strong fingers dug further and further in. All to support her future role, and all ensuring that she wouldn't be able to bounce around as aggressively or annoyingly as before.

Mirko didn't really care that she was growing either. There was a simple feeling inside her at this point. The need to be bred. The constant way that the Nomu held her was pumping her mind full of signals that demanded that she started breeding. It was like she was in several layers of heat at once, completely destabilizing her ability to think coherently and reducing her to such a state of utter need.

Indeed, as she started to climax from having her pussy, her womb, her body and everything else so completely manhandled that she looked less like a Hero and more like a simple onahole for big minions like the Nomu, the more her Rabbit body told her that she needed him to cum. So her pussy clenched down as naturally as she would with any other partner, even though she was supposed to defeat it and get rid of its master so everyone could be safe and secure...

But the Nomu was prepared for her to try and clamp down. It had been programmed to be prepared. So it reared its hips back and slammed in harder than ever before. Destroying her ability to control the pace of this intimacy, all while its balls started to very audibly gurgle and churn. Right as a bulge visibly poured its way up through the length of its cock...

Only to explode at the tip, filling her with so much cum that it almost immediately started to make her stomach bulge out and look like she was several months pregnant. Even though she had only taken her first load. And unfortunately for Mirko, who was quickly wracked by an intense orgasm as her womb stretched further and further in response...

It didn't stop there. The Nomu pushed its hips forward and slammed as deep into her womb as it could go, before firing off another glob of cum that doubled the size of her stomach in a matter of moments. And then it did it again, filling her even more than she already had been.

This was the true power of the breeding quirks that were at the Nomu's disposal. After having prepared her body to make sure that she could handle the full extent of this kind of breeding, it would keep pumping in glob of seed after glob of seed. With absolutely no end in sight. No matter how much those balls audibly churned away at the baby batter inside of them, there was no way that it would run out. No way that it would stop pumping in. All because it wanted to make sure that she was fuller than full. Fuller than she had any right to be.

While Mirko was climaxing over and over, letting her body be utterly dominated by her partner as all of the heat just kept overwhelming her... She couldn't even come close to noticing what kind of damage it was inflicting on her in the long term. These spurts of cum wouldn't just render her completely inflated, no. Even though her belly could now fill a living room thanks to how much had been pumped into her, it wasn't even close to its true potential.

No, the true potential came in the form of how quickly her belly started to grow firm and solid. And all the kicks that started to smash against the inner side of her womb. Because that cum wasn't just splurts of extremely virile semen. No, it was practically a fully fertilized egg shot straight into her. Using her womb as a way to incubate as she was impregnated far beyond anything she was able to handle. She was...

She was little more than a factory at this point. Cum would pour into her, and a Nomu would come out. At least, that was what was supposed to happen. But a combination of the cock still buried in her hole and the added need to breed meant that they weren't quite ready to pop out. But it wouldn't be long. Not while she was this broken...

"That's enough, Nomu." Shigaraki said, and the Breeder Nomu obeyed its master. Pulling the utterly broken bunny off its cock and letting her land on the ground with very little harm actually done to her. The sheer size of her curves meant that she wouldn't be broken by a simple fall, not more than she already was at any rate.

The Villain looked upon the Hero. All while she quietly leaked cum out of her hole, her thighs twitching every few seconds as a bigger burst of cum bubbled and popped its way out of her hole. All while he slowly put on a pair of gloves that prevented his fingertips from touching her, and then removed his pants...

All so that he could mount her like his minion had. Letting his surprisingly hung cock slam straight into her. "How's it feel, Hero!?" Oh, he had been waiting for this for far too long. Mostly because watching his minion go at it without giving him some action was far too much for him to endure. He was going to finish her off. And use her as a factory for his heirs as well.

Mirko didn't respond. She couldn't respond. Well, she could moan as she was being rammed by somebody that was surprisingly rougher than the one that was using her like a cocksleeve. It was like... It was like her pussy was being stimulated from every possible size, even though he was only slamming into her with all of the power in his hips.

She needed him. She craved him. She didn't know who was fucking her, as her mind was currently nothing more than a slurry of pure desire and need. All that she knew was that she wanted his seed to add to the breeding batter inside of her. So it could form even more delightful children...

Her instincts as a Rabbit had practically consumed her thanks to how much the Nomu had nudged her. And it certainly helped satisfy the boy that was fucking her this roughly too, as he soon let out a grunt and started to cum inside her just like his minion had. His thick cum shooting straight inside.

That corrosive cum was just as dangerous as his quirk. As it ate its way through the cum that was already pooled inside her. Reaching further and further, until it reached her eggs. And then it claimed them, sending several popping sensations through her as she was forced to scream in delight from this kind of conception...

As soon as he heard those screams, Shigaraki grinned and pulled himself free. He was satisfied for now. "Nomu. Back to base. The other Heroes will get in our way if we stick around any longer." He gave his minion a command, and it obeyed as it was meant to.

All to bring the new Nomu factory back to base, where she could be further modified for her eternal role...