Cw: piss kink. Bakudeku. Omegaverse.

So, what if omegas, when they are kids, tended to piss themselves if they get too excited. Most adults think it's kinda cute bc it's a almost sure way to know if the kid will present as omega and it's adorable to see the little ones jumping

around, being so happy about a new toy or something like that, until they pee themselves.

The thing is, Izuku never grew out of it. It's little, most of the times he can control it to just a few drops.

His mother bought him a new All Might poster? Just a couple of drops.

He got an A on a test? A few more drops.

It's not a big problem. Betas can't even smell it and the slick-absorbent underwear is enough to handle the flow.

But then, Izuku meets All Might and gets into UA. His levels of happiness and excitement grow exponentially.

All Might asks him to be his successor? Izuku gets DRENCHED.

Got his UA acceptance video? He had to go straight to the shower.

Meeting new friends, having hero exercises, participating on the cultural festival? That all makes him spill a few drops, but he manages to save face.

But Izuku manages to keep his little issue in secret from his classmates.

It would be so shameful for it to get known by everyone. It's already hard enough to be taken seriously as a hero being an omega in a school fill of alphas and betas. But to be an omega who pisses himself?

He'd never get over the embarrassment. He'd be ridiculed forever. Kacchan would trade calling him 'cry baby' to call him 'piss baby'.

And he and Kacchan have properly mended their relationship now, working as proper rivals. Sure, the alpha still teases and taunts him, but they

train together every week. And Izuku is getting so close to winning at their weekly spar! He can't wait to see Kacchan's expression when actually manage to pin him down!

Will Kacchan get angry? Will he yell at Izuku and tell him to not get conceited? Izuku giggles imagining how

Bitter the alpha will be to admit Izuku's victory.

But that's not what happens.

The first night Izuku manages to pin Katsuki down, properly winning their match, Izuku waits with bated breath Katsuki's anger - but what he receives is the alpha smiling at him proudly.

"Good job, nerd. Better late than never, hm? I guess you aren't useless as a rival."

Izuku feels elated. He won the match, and Kacchan congratulated him!! Not only that, Kacchan recognized him as his rival! It's the culmination of everything Izuku worked for!

He's so damn happy that it takes him a little longer than he should to notice the pool of warm wetness growing between him and the alpha he's straddling.

Izuku watches mortified as his pee spreads from his groin to Kacchan's abs, wetting the alpha's tank top.

The air fills with the scent of omega's pee and happiness. But the happiness quickly changes into distress. All excitement is gone as Izuku realizes what happened and enters into panic mode.

With one quick glance to Kacchan's face, he sees that the alpha is taken by surprise.

But it won't take long for Kacchan to fully comprehend what happened. Scared and mortified, Izuku jumps out of Kacchan and runs away, OfA pumping his legs.

All the way back to his dorm, Izuku cries and thinks this is the worst that could have happened. Now way Kaccchan will

keep seeing him as a rival after all of this.

But what Izuku doesn't know is that, back at the training room, Katsuki is anything but disgusted. Actually, he's never been more turned on in his entire life.

You see, Katsuki has already accepted that he'd eventually mate with Deku. The dweeb is the only omega that measures up to him, and the only that Katsuki actually likes the scent.

But Katsuki had been taking things slow. They are still in high school, for fuck's sake, and both

of them are very ambitious in their pro hero careers. The plan was to keep close enough during high school to make sure no other fucktard decided to try anything with his Deku, and later after graduating, they could start properly courting. Katsuki was playing the long game,

no need to rush and fuck things up.

But that changed the second he felt the delicious warmth of Deku's pee soak him body. The scent was inebriating, it made Katsuki's inner alpha take control of his mind instantly and his cock hard as a rock, knot ready to pop.

Even after Deku ran away, Katsuki keeps laying there on the floor. Basking on the scent that lingers on him and imagining all the lovely scenarios in which he can make Deku piss himself from happiness and pleasure.

Only after the pee completely cools on him is that Katsuki minds gets out of the gutter. He gets up, shaking his head and notices the scent of distressed omega that undelines Deku's lovely smell. The little idiot got nervous...

Oh well, whatever. Now Katsuki will have to rush his plans a little. He can't let Deku think shit about what just happened - and he honestly won't be able to resist a couple of years longer until he has his omega pissing himself on Katsuki's bed.

( TBC maybe if I have the time. I make no promises.)

(Alright, I hear you guys )

Since that awful day, Izuku has been keeping as far away from Kacchan as he can. He can't even meet the alpha's eyes from shame. It's been already one week and he wonders how long will he have to keep ignoring Kacchan’s messages and running away

when Katsuki gets too close.

In class, it's awful. Izuku has to keep on his toes to always make a run when the class ends.

But Kacchan hasn't making it easy.

"Hey, Deku!" Katsuki calls him the second Aizawa leaves the room. Izuku already had his books in his bag, ready to

leave as well. "I saw you had an 85 in the test. Now bad, dweeb."

Izuku's heart speeds up at the praise. His hand holds tight in the strap of his backpack and his face threatens to break into a smile. That's so cool! Kacchan never praises him for school stuff! Izuku is so happy-

And then Izuku realizes what Kacchan is doing. He's trying to make Izuku wet himself in front of his classmates. Instantly, his happiness vanishes. He can't believe Kacchan would do something so mean!

Izuku closes his face, turns around and runs out of class.

***

Katsuki is going crazy. It's been more than two weeks since he and Deku scented each other. The omega canceled their weekly scenting sessions without an explanation and has been ignoring Katsuki since their last scenting session.

Kirishima said Bakugou should have stated clearly

that those were scenting sessions, but it was clear enough, right? They always end up reeking of each other! Working up a sweat during training and then wrestling on the floor is the best way to scent an omega. Katsuki's pheromones cling to Deku for a week after that! And if

he feels like he needs to brush up his scent on Deku, he could always headlock the dweeb after class for some reason or another.

But since Katsuki's style of courting wasn't working anymore, he decided to try a more traditional approach.

The first attempt was praising Deku

for his test result. For a split second, Bakugou thought it had worked. But then Deku looked hurt and ran away.

Still, he didn't gave up and tried praising the little omega for all the small silly things Katsuki has always appreciated but never voiced out loud.

Like how well he did in hero training, how his hair was looking especially fluffy, how he seemed to have such a healthy appetite. But Deku didn't stick around to hear any one of Bakugou's compliments.

Katsuki's friends were having a field day, mocking him for his failed attempts

at counting his omega. Kaminari even dared to say maybe Deku was into another alpha - that earned him a howitzer impact to the face.

Still, Bakugou knew he had to up his game. So he bought a box of chocolates and an All Might pillow. Candy and nest items are traditional courting

gifts. There's no way they could ever be misinterpreted by anyone.

It's a big step to take while still being in high school, but Katsuki decided that 'fuck it'. He won't resist any longer without being able to scent Deku and spend time with him.

And he's excited to see Deku's reactions to the gifts. Surely his omega will be elated. Deku must have been waiting for Bakugou to take a more serious step in their courting for years. Katsuki wonders if he'll be able to make Deku piss himself again. Thrill runs through his body

just from imagining smelling that rich scent in the omega's room. It may be enough to throw him into a rut despite his blockers.

So armed with the gifts, he marches on to Deku's dorm and bangs on the door.

"Coming!" Deku calls from inside but when he opens the door and sees

Bakugou, he tries to slam it back shut. Katsuki just barely manages to hold it open.

"Stop it!" Bakugou demands.

"You're gonna break the door!" Izuku protests as the flimsy wood bends, trapped between the two strong heroes-in-training.

"Not if you let me in!"

"Kacchan, get out!"

"No fucking way! /Let me in, now!/" the last phrase came with the power of his Alpha Command. Katsuki has never used it against Deku before - not that it should help much, Deku was trained to resist Commands when he got into UA.

But, just like magic,

Deku takes a step back and releases the door. Bakugou stumbles inside and kicks the door close to give them privacy.

"You forced yourself into my room!" Izuku accuses, making Katsuki wince.

"I know. I'm sorry. But we need to talk and you keep fucking running away!"

"I don't want to talk to you!" Izuku crosses his arms and turns his back to Katsuki.

Bakugou's inner alpha whimpers at the rejection and he knows his pheromones must be expressing his sadness.

"I brought you these" Katsuki says, walking around Deku to force the omega to look at

the gifts.

Frowning, Izuku reached for the gift bags and pulls the items out. Katsuki's heart speeds up on his chest as his whole body gets ready to hug Deku and feel the warm wetness on his groin again.

But to Katsuki's extreme disappointment, that's not what happens.

Deku asks coldly, "What is this, Kacchan?"

Katsuki smirks, "you're a big boy, Deku... You know what it means when an alpha gifts an omega nesting items." It's a very straight forward way to say you want to be invited for the omega's nest, exactly what Bakugou hopes.

Deku's eyes fill with tears, "How can you be so mean? Get out!" Deku throws the gifts back on Bakugou's lap.

"What? Who the fuck is mean?! The damn pillow costed a fortune! And I went all the way back to Musutafu to buy the chocolates you like!" Katsuki barks furious.

"All this damn work to make fun of me!" Izuku accuses, fat tears coming down his face. "Just to make me pee again so you can laugh at my face!"

Katsuki blushes at the accusation that he wanted to make Izuku piss. Yeah, he wanted that, but not for the reasons Deku is imagining.

"What? Why would I laugh at you for that?" He barks.

Izuku is sobbing at this point. "To- to- say I'll ne-never be a he-hero or-or your rival. Ca-call me a piss baby."

The room fills with Izuku's distressed pheromones and that breaks Katsuki's heart.

"What? No! Never!" Instinctively, Katsuki closes the distance between them, pulling Deku into his arms. Deku keeps stiff but doesn't shove him away. "Shit, nerd, I'd never say that to you... Not anymore. I thought you knew I'm better than I was in middle school."

"I tho-thought so, but th-then you started te-teasing me, saying stuff about my- my hair"

"But I wasn't fucking teasing!" Katsuki cups Deku's cheeks and forces the omega to face him. "I do think your hair is pretty"

"So you don't want to make me piss myself?" Izuku asks wobbly.

Caught on his lewd thoughts, Katsuki blushes and looks away, making his guilt clear.

"You did!" Izuku exclaims, taking a step back. "You want to see me pee!"

"Yeah! But not for the reasons you're thinking!"

"Why the hell would it be?" Izuku yells.

"Because it's fucking hot!"

(TBC)
(Yes, there will be more pee)
(But first Kacchan has to make Izuku happy ;) )