[Brain Drain, Pheromones, Femdom]

"H-Haaah... C-Come on, I-I wanna cum..."

The tense breathing and needy gasping that echoed out through the dark room belonged to one young man, who was currently doing his best to rut away at the extra squishy and extra fake toy that he had been using ever since he was admitted to the school that he had always wished to study at...

His name was Midoriya Izuku, known as Deku to the ones that were closest to him. And thanks to the particular nature of this world, he was born with a Quirk that had blossomed in his teenage years. A mutant-type Quirk, just like everyone else, which left him as a centaur. This world was populated not by Humans, but by various beastkin and animal-like beings, all of them saddled with the loss of their pure Humanity as they grew older.

And while there were several that were able to develop new Quirks as they grew older, allowing them to fight and protect people with both their mutated bodies and any other abilities that they might have on hand, a lot of people were saddled with just the mutation and nothing else. And those that were particularly unlucky would find that their mutation grew stronger and even harder to resist, resulting in their animalistic instincts taking over them and forcing them to act accordingly.

Deku was one of those young men that had gone through such an experience. His cock, that massive shaft between his legs, was always throbbing. Every single minute of every single day, it always wanted to blow harder and harder. The more he tried to ignore it, the more it would cloud his mind until he pumped it straight into a proper hole. Which was why he was currently thrusting into a massive onahole-style toy.

An Artificial Mare. Since there were many boys like him in the world, these things were in great demand. Soft and squishy, yet at the same time perfectly molded for their equine lengths. Really, those toys were little more than a sculpted mare's ass, but it was perfect for their instincts. As long as they could keep rutting away at something like it, they could regain the weak control that they had over their mind...

But not everyone was satisfied with something like that. Deku was one of those as well. No matter how hard he rutted away at his Artificial Mare, he just didn't feel the satisfaction that he needed. He knew that it would get him close to blowing his load, and he knew that it was making him feel really good. But there was just something about it that stopped him from actually cumming.

"C-Come on... Y-You worked so well all the other times, why don't you work now?!" The young centaur cried out as he kept on thrusting as hard and as fast into that hole as he possibly could. He wanted to cum. He wanted to make that haze in his mind wash away. All so he could try and focus on his homework or... o-or...

Deku's eyes widened as he experienced a moment of clarity. Not because he finally got to cum, of course not. It was because his mind drifted to the many classmates that he had. All of them beastkin, just like him. All of them with fertile bodies that immediately made his balls audibly churn. That was why he couldn't focus on fucking this toy. It was because he wanted to screw them. It was because he wanted to thrust into one of his friends and fill them to the brim..!

Momo, the Centauress... Tsuyu, the Frog... All of them beyond that, all of their extra fertile bodies that he could imagine. The sight of them made him rut more and more, with no promise of release in sight. He wanted to cum, but the more he wanted to cum, the more he just couldn't. All thanks to how fake the Artificial Mare felt. He wanted to fuck a genuine beastkin pussy..!

Suddenly, a loud snort forced its way out of his nostrils. All because he felt something wrapping around his extra thick shaft. It was like he could cum right at that moment, only for the limb to wrap around the base of his rod and squeeze so tightly that there was no way his cum was going to spill out. No matter how he tried to rut, he just wasn't able to do so...

"Ribbit."

Deku felt a powerful shiver rush through him as he heard that seductive voice pour into his ear. All while he tried to look to his side, only to look straight into the eyes of Asui Tsuyu. That frog that he had been lusting after. He didn't know how long she had been there, nor how she had gotten inside. All that he knew was that his balls clenched just by having his eyes meet hers. He wanted to cum. He wanted to cum inside her. He wanted to cum, he wanted to cum, HE WANTED TO CUM!

Tsuyu smiled as she watched his expression turn into pure mind-shattering anguish. She could keep him from cumming and see how much he'd break that way. But she wanted to make sure that he was ready. She didn't stay hidden within his room like this just to be denied a good stuffing.

So she leaned close. And as her tongue suddenly let go of the base of his cock, she whispered one particular word into his ear. One that would send him down a path that would make him completely and utterly addicted to her.

"Cum."

Deku's bestial brain listened to the command, and he let out a loud whine as he thrust his cock straight into the Artificial Mare. Even though it couldn't compare to a genuine pussy, the tongue that had been rubbing up against the sides of his shaft had helped push him past the block that kept him from letting his hot seed spew around inside...

The seed that he wanted to let loose just fired off. The flow itself was as intense as a fire hose, immediately launching the mare off his cock as he just kept on cumming. All while drool ran down his lip as he let out moan after moan. Cumming this hard was hazardous for young beastkin like him. It would result in him being completely unable to act all on his own. All because of the strain it put on his mind...

Not that Tsuyu had a problem with breaking him like this. If anything, seeing his eyes roll into the back of his head as he turned his floor into a wet and sticky mess just made her all the more aroused. She had been waiting for a good stud to show up, and Deku was definitely perfect for her. The other boys were far too aggressive for their own good, and she'd have to work so much harder to tame them and make them hers. But this boy...

Oh, he was perfect. He wanted to be alone so he didn't have to bother anybody. Not while he was working through the worst parts of puberty as a centaur. But that was what made him so enticing. Because of how much his instincts controlled, she just had to lure them in and then she'd be able to clamp down right on him. And since he was already left rather exhausted and weary from cumming like this...

Tsuyu giggled. And she slowly sat down on the bed nearby, her tongue tugging on the cock that had stopped splattering cum all around the place. Thanks to the way that her tongue was coated in a highly arousing type of liquid, courtesy of her own Quirk altering the chemical makeup of her saliva, she could easily direct the boy to look towards where his cock was being pointed...

And as Deku snapped back to reality, he was greeted with Tsuyu's perfect form. She was an apex predator among the female beastkin, because her body already looked like it had been through several decades of breeding. Thick thighs, heavy breasts, and a look that practically made him cum just by looking at her. The only thing she was missing to complete the look was a big fertile belly. And his cock was practically begging him to do the deed. To fill her up and make her his mare...

"N-No..." But he tried his best to resist. Not because he didn't want to fuck her, he definitely did. But it was more because he wanted it to be a purer relationship. He didn't want to get forced into this, just because he was too horny. He wanted to know more about Tsuyu. He wanted to learn everything about her. All so he could appreciate her more and more.

Tsuyu didn't need that. Far from it. As she saw the boy trying to back away, her tongue just extended and wrapped around his cock even more, even managing to wrap all the way around his balls. And just like before, she squeezed down. Slathering his breeding tool in her perfect saliva, which would definitely end up driving him completely and utterly mad...

Another powerful whine left Deku's lips as the forceful grip that her tongue had on his cock, plus how her saliva was soaking into it and forcing him to even greater heights of pleasure, forced him to cum all over again. And not just once, but several times over. As soon as he thought he was done cumming once, he would be forced to cry out yet again as the cum just splattered onto her or onto the floor below.

It wasn't just that he was cumming again and again either. His breeding tool was growing as more of her saliva soaked into him. It wasn't just meant to arouse him, but it was also making him an even better breeder. At the cost of his mind and his control over himself, of course, but Tsuyu didn't care about that.

All she cared about was the way that he slowly started to walk towards the bed. His mind was clearly on the verge of emptying completely, and it wouldn't take much more to make it completely irreversible. She just needed to give him the last little push, and as he was made to pull his front hooves onto the bed, she was in the perfect position...

Deku moaned even louder than before as he suddenly felt his cock sink into one deep and extra tight hole. It was almost what he had dreamed of. Which just made him try to thrust forward, though he just couldn't. Partly because of his current position, and partly because of the tongue that was still wrapped around his shaft. So instead he just kept on moaning as his cock went deeper and deeper.

He couldn't even recognize that he was currently stuck in Tsuyu's throat. He couldn't recognize anything. All that he recognized was the pure pleasure that came with everything. The pleasure that made him moan over and over again. He wanted to keep on enjoying it. He wanted it to never ever end. All so he could cum eternally. Because that was what had been drilled into his mind at this point. To pursue the endless pleasure and gain nothing but pure enjoyment from it...

As soon as Tsuyu reached all the way to the base of his cock, her tongue unfurled from around her stud's rod. And that caused it all to blow, his cum rushing down her throat as he let out moans upon moans. The look in his eyes had drained completely. Nothing left in there, with the boy's instincts having taken over completely. He would follow whatever female gave him what he wanted. He would fill her, and he wouldn't stop until he couldn't cum any longer. He would be perfect for endless and continuous breeding...

Which was exactly what she wanted. Even as her belly bloated outward with all the cum that was sloshing around inside of her belly, she knew that this was just a mere fraction of how big she could get. Especially once he did everything she wanted. Especially as she popped right off that cock, which was now completely covered in her saliva, preventing the boy from keeping his posture as the lone anchor that kept him standing was yanked away...

Deku was beyond exhausted. His balls were heavy. His cock was heavier. And both were still raring to go. But he was so exhausted that he couldn't stop himself from collapsing onto his back, the bed doing its best to withstand his weight. All while he couldn't even look towards the frog that had domesticated him.

Which was why he couldn't see her mounting him coming. It happened so quickly too. She just made sure that his cock was pointed upward, and then she slammed down on him. There was no foreplay. There was no tender love. There was just breeding, and as his eyes tried to focus on her, he understood that completely.

Just like he understood the colors that were swirling in his eyes. Just like he understood the way that her tits bounced and complimented the colors. He couldn't see anything else besides the colors and those tits. It was engrossing. Enthralling. So he didn't move. He just looked at what was captivating his mind, and let the frog bounce on her...

"That's it, ribbit." Tsuyu grinned. She could feel him going deep inside, all while she did most of the work. It was reaching real deep. The perfect depth for him to fertilize her. "Shoot it all out, stud. Knock me up, ribbit. That's what you live for. You live to be my stud."

The fertile frog's words were simple but effective. Each sinking into Deku's destroyed brain, with the toxins that her pussy secreted ensuring that he wouldn't be able to forget. That was why he kept on seeing those colors. Why he couldn't focus on anything but her heavy tits. Because he was being totally and completely brainwashed.

He didn't mind. He couldn't possibly mind. All that he could do was nod like the dope that he was. All while he felt the pleasure inside him growing more and more. He wanted to cum. He needed to cum. He needed to make all of his studly cum splatter around the inside of his mare's pussy. She wanted him to impregnate her, so that was what he had to do..!

"Cum!"

And as she gave the command, Deku did what was asked of him. He let out a whine and the cum just splattered all around in there. Flooding her womb beyond compare. Ensuring that she would be knocked up, just as she wanted. This was what he was meant to do. He was meant to impregnate girls like her. To fill them with his cum...

That was a mindless stud's duty...