Thread by @briarbaku

#shinbaku a/b/o bakussy 🔞

Even as a third year now, Shinsou still finds it hard to get along with Katsuki until he accidentally walks in on him mid-heat.

And instead of screaming at him to gtfo, Katsuki spreads open his wet folds w/his fingers and gives Shinsou a perfect view.

Having Katsuki milking him was not what Shinsou expected when he’d first sought him out for tutoring sessions.

He definitely wasn’t expecting to agree to be Katsuki’s heat partner while the omega rode him, mouth covered with sticky cum as he moaned the request out to Shinsou.

But afterwards? When the omega lay purring on his chest, full of cum and a fat knot to plug it all in place, Shinsou couldn’t help but think what this may all lead to.

Maybe nothing. Just two people getting their fix and that’s it.

And that’s how it was, for the first couple of months afterwards. He was there for Katsuki’s heats and nothing more. They rarely interacted outside of those heat sessions beyond the usual.

As though Katsuki wasn’t swallowing up Shinsou’s cum in all his holes.

But then, as graduation came near, there was an unspoken question hanging between them.

And it stayed that way until Katsuki ‘accidentally’ walked in on Shinsou’s rut, wearing nothing but the alpha’s own scented shirt left behind in his nest.

Even though Shinsou was Katuski’s heat partner, Katsuki was not Shinsou’s rut partner for a reason.

That reason being that the moment Katsuki walked in wearing nothing but Shinsou’s shirt with slick running thickly down his thighs, the rutting alpha practically pounced on him.

Katsuki happily allowed himself to be roughly handled and maneuvered until his ass was in the air and Shinsou’s wet tongue lapping up the juices while thrusting his fingers in and out of his folds.

He barely got any warning before a fat heavy c*ck was shoved into him.

Katsuki cried out in surprise but was cut off as Shinsou leaned his entire body on him, crushing him against the floor as he thrusted in and out of the omega like he was nothing more than a hole to fck.

The rougher he was handled, the more slick that came gushing out Katsuki.

He could feel the burning pain from where Shinsou’s claws were gripping him down tightly, to hold him still as he was violently thrusted into over and over. He loved it.

He loved feeling like he was being used, like he was nothing more than a sloppy wet hole for the alpha.

Katsuki was so high in pleasure, he was barely aware of Shinsou’s rumbling voice brushing against his ear. Until he heard the words “mark” and “claim” and Katsuki eagerly nodded.

“Claim me,” he begged in a rough voice as he felt Shinsou’s knot begin to swell as it slid in & out.

He steadied himself as much as could under Shinsou’s body against his and met each of the alpha’s violent thrusts with his own, begging over and over to be claimed.

More slick gushed out of him, filling the room with sounds of it being slapped and slushed against skin.

The room itself was filled with powerful scents, from Shinsou’s overwhelming pheromones of rut and Katsuki’s intoxicating heat that had just been triggered.

It was all so much and yet not enough.

So when Shinsou’s knot finally locked inside Katsuki, the omega cried out as the alpha sunk his fangs into his nape and came deep inside of him.

Katsuki felt waves of heat and pleasure and then promptly passed out.

—

When he woke up, Katsuki found himself on Shinsou’s bed, being held close by the alpha in his arms.

A long wet tongue was lapping at his neck, where he could feel a throbbing pain emanating from, and between his sore legs he felt a knot still locked deep inside him.

He felt as though a heavy blanket of warmth had settled over him and his bones. Shivers of pleasure would shoot up from where gentle fingers rubbed slowly on his clit and folds where they held the knot in.

It all felt so nice that he naturally began to purr.

The tongue and fingers paused for only a moment before continuing their rhythm.

Katuski felt Shinsou’s chest rumble against his as he spoke, voice deep and husky; “You’re awake.”

The omega hummed, eyes still closed as he enjoyed all the pleasant sensations.

“You came.”

The voice wasn’t annoyed or upset. But Katsuki could hear the protective concern behind the statement.

A young unmated alpha in rut had little control over their instincts. Especially when there was a slicked up, unclaimed omega covered in their scent before them.

It was dangerous, but Katsuki knew what he was doing and Shinsou wasn’t blind to it. Especially since it was something he wanted so badly, but unable to bring up because of fear of rejection.

He just didn’t want to accidentally hurt Katsuki while in rut.

But now Katsuki was his & the Claim Mark on his nape proved it.

And as he felt his knot slowly begin to deflate, preparing for another round, Shinsou felt that the omega had knew exactly what he was doing since that first day & the alpha was all too happy to give himself to him.

🤍

Shinbaku always make me write way more than I intended