Izuku trembled slightly in fear, as the rabbit hero stared him down with a crazed and desperate look. She was practically foaming at the mouth as her bloodshot eyes locked in on him and her ears faced his direction.

A moment passed, as Mirko just stayed where she was, panting for breath with several cuts in her suit from Snipe and buildings falling on top of her. She was most likely too exhausted and scatterbrained to even recognize what was in front of her.

Izuku was simply too scared to move. Had it been a spar or test, it wouldn't have bothered him so much, but he could see the insanity in her eyes.

Mirko's mind had well and truly been broken by Nezu's attempt at sedating her. In a way, she was even worse then Jiro had been, only she was taking it out on everything and everyone else, instead of focusing that madness and desperation inwards.

"Midoriya…" Mirko suddenly whispered and Izuku saw her thigh muscles tense up.

"M-Mirko…look, just calm down and I'll-"

ZAP

Izuku gasped as Danger Sense flared.

The fact that it had triggered at all, caused Izuku to hesitate for a fraction of a second, and the only thing that kept him from becoming very dead as Mirko leaped at him with full force, was One For All at 68%.

Izuku grunted as he landed out in the street, after jumping over Mirko. His legs bruised and bones cracked from using so much power.

Izuku quickly focused inwards though and pulled out one of the quirks he got from Setsuna, and the bruises quickly healed.

"Thank you Lizard Regeneration" Izuku muttered before hopping away as Danger Sense went off again.

"Mirko! I'm not trying to fight you! Why are-"

"Midoriya!" Mirko cut him off as she gave chase.

"Where is he!" she yelled as delirium clouded her mind.

Izuku blinked as he clung to the wall of a building.

"What…" he muttered in deadpan, before hopping away again and bouncing between buildings.

"Is she really so far gone that she can't even recognize me!?" Izuku muttered in disbelief as he stayed just one hop ahead of Mirko.

Danger Sense screamed louder at him suddenly and Izuku soon learned why, as Mirko faked him out on her next move and intercepted him mid jump.

Fear gripped Izuku as her legs locked around his head and she squeezed tightly.

Izuku was suddenly very thankful that Setsuna got to him first, as his head popped off and floated away before reattaching to his body as he fell.

"That would have killed me!" Izuku thought with terror as he quickly teleported away from her dropkick.

Izuku collapsed onto a nearby roof he had tagged just in case, and hyperventilated.

"Holy shit! I knew her mind was broken, but not this bad" Izuku muttered as his mind raced.

He quickly turned his gaze back in the direction he'd come from and used that quirk from earlier again, causing his eyes to glow read as he saw Mirko already hot on his trail.

"Oh this is bad! How do I get through to her when she can't even recognize the thing she's after! The only thing that got through to the other girls was-" Izuku paused in his ranting as a plan formed.

His face then fell in shame at what his mind had concocted.

"This quirk is corrupting me…" he muttered in defeat before sighing. There wasn't even any guarantee that it would work and she wouldn't lash out anyway, but he didn't have much choice against Mirko. She was know for her reputation of getting the job done, regardless of what happened to her.

"Well…I guess it's already too late to say goodby to my innocence…" he muttered as he hopped down into the alley.

Meanwhile, Mirko's vision was a foggy red tunnel, as she chased after the amorphous blob that smelled and sounded like Midoriya.

Surly this shape knew where Midoriya was.

Or at least that's as close to a rational thought as she got, with her psyche in itty bitty pieces.

That didn't matter to her right now though. She could hear and smell that fuzzy green blob in this direction. She then hopped up and smashed through the wall into the alley, where she was met with…

A dinosaur?…

In her current state, Mirko couldn't quit make it out, but it was vaguely shaped like a green raptor of some kind, and it ran passed her while swiping at her with it's claws.

It didn't hit her as she hopped over it. It only ripped her suit open.

It didn't matter.

All that mattered was that it was in the way! Even as it shrunk down and took a more human shape.

Mirko jumped and made to kick her target, but instead of running, it reached out and grabbed her legs with incredible strength and held tight, even as it fell back and dragged her with it. Pulling Mirko's legs in a fashion as if to bring her down onto it.

"AAAAHHHH!!!"

And suddenly the fog was gone.

Her mind was still broken and hazy, but a few pieces had snapped back into place.

The fog that clouded her vision, replaced with a burning hot, rod of pleasure, driving it's way up into her drenched and desperate womanhood, and filling that maddening emptiness.

Mirko was stunned for a moment, as her mind breached the surface of insanity.

Her gaze then fell and she saw the face she longed to see. His clothes discarded and his naked form on display for her thirsty eyes.

"Midoriya!" she exclaimed with surprise and relief.

That relief was quickly replaced with excitement and a mad grin, as she planted her feet on the ground and leaned forwards.

Izuku gulped as Mirko's face came within inches of his.

It would appear the plan had worked.

So why did he feel like he'd made a terrible mistake…

BAM!

Ah, that's why…

Because of the cracks that formed in the concrete ground beneath him as Mirko came down on him with all her might and causing the bones in his pelvis to vibrate.

Izuku grunted in pleasure and pain as Mirko began riding him hard into the ground and she cried out in pleasure.

Izuku had ripped her suit to pieces, expoing everything. She was so tight and wet. Her toned and muscular body was incredible and her C cups with small brown nipples were bouncing back and forth over him.

Unfortunately, this pleasure was paired with her powerful thigh muscles sending her crashing down on his pelvis.

"I can't believe I'm actually doing this" Izuku thought as he stared up at the woman, riding him to oblivion. Mirko wasn't old, but she was older then him and the other girls he'd been with, and that left him feeling both ashamed and aroused.

Izuku shook those thoughts away though, as he focused on the hot and muscular woman that was on top of him.

"It's too late to start regretting anything, and I can't waist time" Izuku thought as he took a breath between grunts of pleasure and discomfort.

He then reached up and grabbed her breasts and started squeezing them, causing Mirko to yelp.

"Yes! Play with me big man! Breed this bunny!" Mirko cried out before being overwhelmed by cries and moans.

She then froze up and screamed as her overstimulated and neglected womanhood suddenly clenched down on Izuku tightly with her powerful muscles and she squirted all over his pelvis.

The boy grunted with pleasure at the vice like grip, and moaned as she immediately started bouncing again, even as she still squirted.

"AAAHHH!!! YES! FUCK YES!" Miko screamed as she finally found some relief.

Izuku grunted as he stared up at Miko. She wasn't anything like the others girls. She wasn't inexperienced or shy. Even the smell was more intense too, like with Hatsume, he could just tell her body was well suited to breeding. Maybe his time with Hatsume was the closest to this, but even then, Izuku felt some level of control once he flipped her over.

Now he wasn't sure if he could match her strength and stamina without hurting her.

That was a concern for later though, as Izuku leaned up and latched onto her left breast.

"AAAHHH!!!"

Mirko cried out as she felt the harsh suction on her tit and his tongue gliding over it.

"Gah! Yes! Don't stop!" she cried as she held his head to her chest and continued riding him into another orgasm.

Izuku grunted from both the tightness around his manhood and the impact against his pelvic area. He kept his mind focused on the task at hand though, and was rewarded with Mirko's breasts going up a cup size and a wonderful taste that hit his tongue.

"AAHH!" Miko yelped as milk shot out of her nipples and she climaxed again.

"Oh yes! AAHH!" she cried out as she increased her efforts to ride Izuku into oblivion.

Izuku grunted and released her breasts after a particularly painful slam to his pelvis.

"If this keeps up, she's going to brake me" Izuku thought as he paced his hands on her hips to try and lessen the impact.

He found no such luck though. She was just too strong and Izuku was already using a good amount of One For All to keep from getting pulverized. Any more and he might do damage.

Izuku gritted his teeth as she slammed down on him hard again and he looked up into her crazed eyes.

She wasn't going to listen to a word he said right now.

So, not yet fully trusting his new regeneration quirk and in a desperation of his own, Izuku brought his hand back and slapped it on Mirko's firm butt.

"AAHH!!" The rabbit hero yelped and she jolted up with surprise. She was stunned for a moment and that was all Izuku needed to quickly pull out of her before she could notice.

"Hay! What do you think-" Mirko started but was cut off by Izuku vanishing in a flash of green.

Mirko's mind almost broke again at his sudden abandonment, but she quickly realized his hand was still touching her butt.

"AAAAAHHHHH!!!!"

She then screamed in pleasure as Izuku thrust back into her from behind and penetrated her womb, sending her into another orgasm.

Izuku grunted as he clinched his eyes shut from the pleasure and then pushed Mirko down on all fours as he placed his own legs in front of her hips, as he leaned against her back. His arms reaching around to grip her leaking breasts as he began to bunny fuck her, fast and hard.

"AAAAHHHHH!!!!! OOOHHH!!! FUCK YEEEESSSSS!!! Fuck me! Fuck me!" Mirko screamed as she leaned forwards with her butt raised up to give Izuku the best angle and access.

Izuku grunted as he smashed into her savagely and squeezed her breasts, causing milk to spray out. He couldn't afford to let up and give her the upper hand again.

Izuku continued to smash Mirko hard for a few moments and her tongue started to hang out as her eyes rolled back in her head.

Izuku started to feel that wonderful pressure building though.

"Ah! I'm about to cum!" he warned, though he wasn't sure if she even heard him.

He got his answer though, as her insides clenched tightly around him.

"YES! FUCK YES! BREED ME! GIVE ME A WHOLE LITTER! AAAHHH!!!" Mirko's screams echoed through the fake city as she squirted around Izuku's manhood and he grunted into her back as he prepared to make the quirks for their litter of kits.

Only for his eyes to widen in terror at the number he had to create.

The horror was quickly replaced with ecstasy though, as his quirk seamed to react to the large number and amplified his euphoria.

"SMAAAASHAAAAAA!!!!" Izuku yelled as he released inside his bunny.

"AAAAAHHHHHH!!!!! YEEEESSSSS!!!" Mirko screamed as she climaxed as well.

Izuku then gave a long and guttural moan, as he clung to his bunny girl and road out the waves of pleasure as his essence continued to flow out of him, causing Mirko's belly to bloat slightly.

Then it stopped, and there was a brief moment of peace and afterglow as Izuku leaned against Mirko's back with smashed senseless faces on both of them.

It was soon broken though, by Izuku's body seizing up and he fell off Mirko, to his side. His body then began steaming as he grunted in discomfort and his ears grew long and covered in green fur. His leg muscles also grew in strength and power as a multitude of other changes happened, unnoticed.

Izuku gasped for breath as it finally stopped and his body adjusted to the many quirks he just received.

His eyes then grew in horror again.

"H-h-h-how!? I didn't… how- ack!" Izuku's panicked stuttering was interrupted by someone grabbing his long ears and pulling him across the ground.

Izuku then gasped in fear as he found Mirko looming over him.

"M-M-Mirko?…" he stuttered and shrunk in on himself like a scared bunny, only to receive a feral grin, full of madness and hunger.

"We're not done yet. This bunny's still in heat!" Mirko said as she pulled his ears tightly.

Izuku's irises seamed to shrink in terror, as he realized she was still under the influence of his quirk, or at least was still suffering the side effects of having her mind so thoroughly broken.

That terror only grew as she grabbed his ankles and pushed his legs up before positioning herself over his manhood.

"M-M-M-M-Mirko! L-let's talk about thi- OOOHHHH!!!!" Izuku was cut off by Mirko slamming down on him and pushing his legs further forwards.

"Ah! You got to fuck me…now it's my turn!" Mirko said before she start smashing her pelvis into his.

Izuku's mind nearly blanked at the situation he found himself in. The only things keeping him from fainting do to shock and fear, were the pleasure and pain of Mirko smashing him into the ground with tremendous force.

Mirko cried out and moaned as she dominated Izuku. Her breasts still leaking as they bounced with each thrust and her powerful muscles clenching down on Izuku's manhood as he slid in and out of her, causing him to moan and cry out.

Izuku's fingers dug into the concrete ground and dug small trenches as he tried to focus One For All into his durability and regeneration quirk. It was his only hope of coming out of this with his ability to walk and reproduce intact.

It was a difficult endeavor though, as he found himself being swept up in the pleasure, in spite of himself.

They both moaned and cried out as Mirko continued, until her belly started growing, causing Izuku's eyes to widen as he watched it, but Mirko kept thrusting down on him anyway. Only leaning back to accommodate the added size as her powerful legs bore the wight.

"AAAHHH!!!"

They both cried out in climax, as her massive belly stopped growing.

Mirko let Izuku's legs fall as she panted for air and focused on staying upright while she recovered.

Izuku just laid their, shellshocked. The fact that she was holding herself up at all, was amazing in and of it's self. She was easily the biggest girl he'd knocked up so far. Even bigger then Hatsume. But Izuku was also reeling from her smashing him so hard, and he had to resist the urge to reach down and massage his sore hips.

Izuku's eyes bugged out and locked with Mirko's though, as he felt her rise and fall on him again.

"No way…you can't seriously still want more…and while carrying that much wight…" he muttered in fear and disbelief as he looked up at her crazed smile.

"You better believe it~…we're not finished 'till the newly fat lady is singing in her sleep" Mirko grinned down at her prey with hunger.

Izuku felt that karma was playing a sick joke on him, as he realized just how much he would have to give before Mirko came back to her senses.

Izuku then gulped in terror, and he squeak out one small plea for help.

"Mommy"