[Farts, Filth, Size Difference, Absorption/Merge, Corruption]

"Ehehehehe... This body ain't half bad. Ain't as good as all the others, but it's still got its fair share of tricks! Whatcha think, Shota?"

"K-Kouta!"

"Ahhh, you'd be much better if you just embraced that nickname, y'know?"

Kouta trembled as he watched the wicked Villain squeeze his hands into his fat ass. He had seen it happen, and he was shocked that nobody had come by to try and stop him...

This Villain, Mysterio, was a devious Villain. Essentially, his identity was always in flux. Much like many other parts of him. But he could stabilize himself by merging with others... Taking them over in the process. It was how he managed to commit so many crimes and so many atrocious acts, without even getting close to being caught.

And the Hero that had saved Kouta from being captured by Mysterio, Tetsutetsu... He ended up being Mysterio's new host, causing the steel boy to darken as his ass ended up one of his most prominent assets. Emphasis on the 'ass', as he just couldn't stop fondling it. Even in the view of the young boy.

Kouta hated Villains... And he hated Heroes too. But seeing one try to save him only to be turned into this wicked dark bastard... He hated it even more. Which was why he was trying to stay away from him, even as he was captured.

"W-What are you even going to do to me?!" Kouta shouted as he tried to toss something at the 'steel' Villain, hoping that it would deter him. At least a little..!

All that his attempt at struggling earned him was the loud *CLANG* of a wrench bouncing off an extremely durable ass, and a moan leaving Mysterio's lips. All while he laughed and stroked his cock a little, licking his lips in response to the way his ass had just rippled the tiniest bit.

"You wanna make my asscheeks clap, do ya, Shota? Here, lemme give you a taste of some real heavy stuff, that's sure to make these cheeks clap!" Mysterio laughed, before biting down on his lip!

*BRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP*

Just like that, he forced this heavy gray gas out of him. It had a rusty brown tint to it, to show just how filthy it was... And almost immediately after it wafted from his hole, it ended up falling straight to the ground. His gas was just as heavy as he was durable, and even after it had fallen...

It still reeked of that filthy stench, Kouta being forced to pinch his nose so he wouldn't inhale any of the bad stuff. Even if... E-Even if it was making his pants tent a bit. H-He wasn't into that stuff, he definitely wasn't. But it just...

"The look on your face is damn cute, Shota!" Mysterio laughed as he took a seat on his own heavy fart, grinning as he felt one of the jagged bits push up against his ass. Almost penetrating him outright, causing his cock to pulse a bit. "C'mere. You'll wanna get used to these, because you'll be training on them soon enough. Or you'll be trapped in one, pick your poison!" He laughed in such a cruel way...

What could he possibly do to get away from him? Kouta tried his best to think of any possible way, but... B-But that'd... That'd require a Hero. As much as he hated them, there was no way out of this without a Hero's help...

And Mysterio could definitely see the anguish building on Kouta's face, which mixed perfectly with the arousal that was slowly building through the boy. "Come on, Shota." The depraved Villain laughed as he let his fingers run across his cock, especially as it rubbed up against a part of his petrified stench that was shaped perfectly for idle grindin'. "Just let it out, you'll have so much more fun if you do!"

What kind of fun was he going to have with a Hero!? He was a Villain, and he was going to lose if he fought a Hero. Even if Kouta hated Heroes, he knew that they... Yes, they'd do it. And... And this bastard who was making him feel weird down there, he was going to pay for what he had done..!

"HELP! PLEASE, HELP ME! HERO!" The young boy cried out, the last hope he had in his heart bursting out as he shouted for their help. He'd take anybody's help at this point. All so he could escape from the clutches of this stinky, awful, horrid Villain..!

Mysterio smirked as he watched the boy cry out. All while he didn't notice the wet spot forming in his pants. Heh, he had done just as he had asked. Letting it all out while he was trying to get help. How cute. That would make everything that much more fun...

Even the sound of the ceiling above him being caved in didn't stop him from laughing, nor did the hand slamming down behind him. It would've terrified anybody that wasn't prepared, but he wasn't like them. Even without being prepared for the arrival of a giant, he had more than enough tricks up his sleeve... And a couple up his butt too, just in case.

Kouta gasped as he watched a head slowly poke its way in through the broken ceiling. A blonde, masked woman that seemed... It was that woman on TV that was so proud of her curves! That proud Hero, Mount Lady! Not exactly who he would've liked to see, but a Hero nonetheless.

"What an icky job, gross." Mount Lady complained as she glared down at the much, much smaller Villain that was so dangerously close to her hand. "Can't believe I missed either. Especially when you stink so bad that I could tell that you were in here. The kid's shouting just confirmed it." She seemed less thrilled about this, but not because she wasn't helping. Just because she couldn't stand stinky Villains, especially one that smelled as bad as he did...

"Awww, I'm just icky? That's no good, that's no good at all." Mysterio laughed as he climbed off the petrified gas he was perched on, his ass making a loud and satisfying 'pop' as the part that snuggled nicely into his donut hole slipped free...

Mount Lady narrowed her eyes as she leaned closer. "Filthy, then? Not like it matters, you're still going to be flattened." Honestly, now that she was looking at the stinky bastard, his curves down there were a little more generous than she would've liked. How the hell did somebody like him have a bubblier ass than she did? No matter, she could flatten it-

*BRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP*

Kouta watched in horror as Mount Lady had essentially brought a horrid fate upon herself. All thanks to how she had come so close to the Villain that he could easily turn his ass towards her and start blasting, with a disgusting puddle of sticky stuff forming right beneath the Villain as he used his farts both for the sake of getting hard and keeping her in check.

"I prefer being called a Stinker, thanks!" Mysterio laughed as the ground suddenly shook, all thanks to the fart that Mount Lady had been blasted with solidifying around her head, causing it to weigh down on her and slam her straight into the pavement. All while she was forced to watch him laugh more and more...

She was definitely struggling, it was easy to see in her eyes. But that wouldn't help her. She was already at his mercy, and no amount of huffing and puffing about it could stop him from coming closer. Nor could she try to stop smelling his horrid scent, because the petrified fart had hooked onto her nose and tugged up to make sure she was getting a taste of everything...

"You better be watching, Kouta! I know you liked it the first time, but how about we try with somebody like her?" Mysterio snickered, squatting down slightly to make sure he was aligned correctly...

All so he could slam his ass right up against Mount Lady's lips. An act that caused him to erupt, and an infernally loud *BRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP* to echo out. Almost as if he had turned into a fart that she was forced to huff...

At least, that's how Kouta understood it. Not that he really did. All that he understood was that Mysterio wasn't there, and the stench in the air had gotten a lot worse. Not to mention, even though Mysterio was gone...

Mount Lady was still there. And her skin had turned... dark. Black, even, just like the horrid boy that had been teasing him and bullying him with his stench. Her hair also took on the same fritzy and filthy look as it went from long and smooth and blonde to dark and all bunched up, all while her plump lips grew plumper and puckered, almost as if she could have a lil' taste of somethin' nice.

The transformation that the Hero was going through just continued to pour across her, as she let out giggle after giggle. She was shrinking, and yet her assets seemed to get bigger. Whether it was her tits ending up around the same size as her head, or her ass being wide enough to occupy a whole couch, she looked like she was even more exaggerated than she was before. Even if it caused her suit to tear down below, because that weak shit couldn't handle an ass as grand as hers...

"Mmmph... Mmmm, I think I could go for mountin' a lil' somethin', ehehehe..."

It was when she started speaking, that blackened version of Mount Lady letting her words slip loose from her lips, that Kouta really felt fear fill his heart. Not only was she speaking in the same way that Mysterio was, but she almost sounded like him. Just with a feminine tint compared to before...

"N-No way..."

He had seen it happen to that hard Hero before, but this was... Well, she was his second victim! He thought that maybe, the first victim would remain! But instead, Mount Lady... No, Mysterio just looked like she had stepped out of an old suit and into a fresh new one, and she was enjoying breaking it in.

"Ehe. Like what you see, Shota?" Mysterio giggled, already getting used to her brand new body. "Sorry to burst your bubble, but that hard boy ain't going soft just yet. He's still in here somewhere, but who knows where." She said, grinning as she came closer and closer to the boy...

All while her loose ass just kept on rippin', fart after fart echoing out. None of them were as all-engulfing as the ones she had let out before, but they definitely were just as hard. Rock after rock fell to the ground, each formed from the hard farts that slipped out...

The sound of each of them falling to the ground sent more shivers through Kouta. He didn't want this. There's no way that he wanted this. And yet he could feel his pants tenting more and more. Was it because Mysterio had taken a female form now that he was getting harder? Or was it just all the stink that had gotten to him, contaminated him? How was he supposed to know about any of that, he was a kid. And a kid just couldn't control his impulses...

Mysterio could certainly see how conflicted he was. How afraid he was. How horny he was. How close he was to simply being pushed off the ledge and falling deep into a pit of stinky depravity. All of which made her laugh more and more, as she turned away from him and started slapping her ass.

As she sank her fingers into that fat ass, Kouta just couldn't stop looking away. There was something about the way that they sank in that just drew him in. More than he would like to admit. He wanted to stop looking, he really did. But he just kept staring. Just kept getting harder and harder. Until..!

*BRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP*

Once again, Mysterio just ripped a fat one. Letting all of that horridly filthy air slip out of her system, and smother Kouta completely. But while he was forced to take another whiff of the smell, there was something slightly different...

Namely the fact that the fart seemed a lot bigger than before. In fact, it was so big that he couldn't see heads or tails of where it started or ended. It just seemed to expand and expand. Not unlike Mount Lady's ability to grow...

If he was closer to being lucid, maybe he would've realized that Mysterio had not only taken Mount Lady's body for herself, but she had also managed to twist the Quirk that the Hero had to her own advantage. Just like she did with the other Hero's. At least all of this wasn't being weighed down on him.

...T-To... To be crushed by a fart... To be forced under that fart and forced to sniff it and slurp it and... and maybe even get stuck under it while... N-No, he shouldn't... H-he shouldn't think of it like that..!

But how couldn't he? He had already been exposed to these farts for far too long for him to even have a semblance of a reasonable thought left inside his mind. All that Mysterio could think of at the moment was just indulging. He had been such a good boy, one that had been troubled by his hate, and here he was. Falling prey to the filthiest yet most basic kind of seduction...

Mysterio laughed and moaned as she let that wonderful fart keep on flooding out of her. She could've just grown all the way back to the size of a giantess, but where was the fun in that? Letting out a giantess-sized fart, however? Now that, that was the real deal. Especially since it started out so concentrated, and then started spreading more and more...

"Havin' a bit of trouble there, Shota? Don't worry, it happens to everyone. But if you ask nicely, I might just help you get hard!" She giggled. She had seen it in a couple of the other boys she had assaulted when she had yet to claim these great bodies, corroding them with her stink. Those boys also fell victim to the thick, pungent smell of her farts. The fact that he had held out so long was actually a testament to how much the boy hated people like her.

But now that he had been forced to take whiffs of the most concentrated form of her stink, there's nothing that he could do to stop sliding further into degeneracy. His body had been filled with her farts, and he was almost one step away from becoming part of her. But there'd be no fun in taking his body, when he could just have a bit of fun with hers instead.

"M-Mount me... M-Mount me!" Kouta gasped and panted, begging as his hands drifted down towards his cock. The cock that had already let loose so much already. His cum started to turn a little yellow from how putrid Kouta was becoming. All while he begged like a whore...

Mysterio grinned, as she almost immediately grew until she was twice Kouta's size. And her ass... Her ass was even bigger. In fact, it was just as big as him, With her hole quivering as she stepped closer...

Kouta's eyes focused on her hole as she came closer, how it trembled and quivered and begged to be filled. And all he could do was think of how it would feel to fill it up. How it would feel to cum inside. How stinky it was... So many awful thoughts filling his young mind...

Thoughts that only grew stronger and more potent as she squatted down, her ass swallowing the boy whole like he was a dildo. Nothing more than a sex toy for her to enjoy herself with. Nothing more than a toy in general..!

Both the depraved Villain and the boy that had become just as horrid as her moaned in unison, as she twerked and bounced on him. All while her farts flooded around him, sinking into him and letting him get more and more tastes of all that awful stuff...

Not that he possibly registered it as awful. His mind had already been rotted by the stink. Even as his skin turned darker and darker, like the horrid Villain that was using him as a toy, he just kept on moaning. His disgusting cum splurting out more and more, leaving a horrid puddle on the ground...

And before long, both of them started to cry out. As if they had reached a mutual climax, with both of their cocks starting to squirt all over the place. Violently so, with Mysterio's cum splattering all over the walls, while the floors were covered in Kouta's cum as he came harder than ever before...

With that, Mysterio pulled herself up. Her stomach grumbling from how much gas was still being produced inside, and how much had to flood out of her still. Not that she focused on it, because the boy was much more important...

Kouta... No, Shota was giggling as he stroked his much fatter cock. His skin had turned just as dark as Mysterio's, his hair was sticky and gross and greasy and just as fritzy as hers, and his expression was no longer full of fear. It was filled with a needy lust, especially as he stroked his fat cock and pushed his hand into his much fatter ass. An ass that let out a pitiful yet potent *Pffffrrrrrt*, showing that he was going to catch up to her before long.

Their eyes locked, and the sound of their brassy release echoed out. Mysterio had made herself a lil' lover, and now... Ehe...

Now, the sound of their farts would deafen the entire city, as they began havin' fun...