Thread by @briarbaku

#shinbaku alpha x alpha

They don’t know how it happened, but they both ended up in the bathroom with Shinsou’s thick knot shoved up into Katsuki’s ass.

Through the thick fog of his rut Shinsou is aware that Katsuki’s nape is covered with bite marks as the alpha begs for more.

Every so often, Katsuki’s own alpha would emerge to snap his fangs over his shoulders at him, growls vibrating through his chest.

But then Shinsou would thrust in nice and deep, hands squeezing hips, and Katsuki would choke out a moan before accepting Shinsou’s hungry mouth.

They aren’t aware how loud they’re being, but it didn’t matter because the music outside was deafening and they easily ignored the banging on the bathroom door.

It wasn’t until Shinsou finally locked his knot and filled Katsuki’s insides did they slowly get their bearings.

Katsuki felt large hands roam underneath his shirt, grabbing at his chest and squeezing as Shinsou rested his chin on his shoulder.

“My place is nearby,” he says in a low voice, thick with want and need.

But Katsuki shakes his head; “My place or you can go fck your hand.”

He feels and hears Shinsou’s laugh, hot breath brushing against his skin and sending pleasant shivers down his body.

They’re avoiding the main issue. Ignoring the fact that Katsuki had tasted blood in Shinsou’s mouth and that the back of his nape was burning.

Katsuki was also ignoring the fact that his alpha is seconds away from tearing through his mental restrains and ripping Shinsou apart. Even now, he had his claws clutching the sink he was bent over hard to fight the urge to whip around and attack.

But he was still hard.

And even through the fog of heat and warring instincts, Katsuki very much wanted more of Shinsou.

He could practically feel the alpha’s bulge through his stomach.

And Katsuki very much liked how possessive Shinsou’s alpha was being with him, especially before he had pulled Katsuki away into this bathroom.

How he had growled and crowded him against the sink, demanding to know why would he let the others touch what was his.

Katsuki found it amusing that Shinsou, who had made it so clear that he didn’t much care for Katsuki & acted so bored and unimpressed (cold even), was actually very jealous and possessive of him.

That Shinsou’s alpha had come out & gone into a rut to stake his claim on Katsuki.

But now he needed to get the hell out of this tiny bathroom and have Shinsou fold him in half on his own mattress.

His own rut was beginning to stir and knew that that pretty soon he would lose what little control he had of his inner alpha if Shinsou didn’t knot him again soon.

“Use your Command on me,” Katsuki finally grunted out.

The body pressing down on him froze; “What?”

“Use your Command to get me out of here before I cause a huge scene,” Katsuki forced out, fangs dripping with venom. “Do it while you still have your stupid knot in me.”

It took Shinsou a moment before he completely understood. He could see the way Katsuki’s muscles seem to ripple as his body shivered underneath him, as thought fighting instincts.

So Shinsou did as he was told, his voice coming out smooth and velvety, Commanding Katsuki.

He could see the way Katsuki’s body easily fought against it and knew it would take more than just his knot to ever bring Katsuki’s inner alpha into submission.

So with careful movements, Shinsou lapped up Katsuki’s nape, letting his own venom lather up the skin.

Katsuki’s body tensed even as Shinsou’s knot deflated inside him, only to shiver as the alpha slid in and out of his wet hole.

“I need to knot you up one more time before my Command can work on you, baby,” Shinsou explained, his fangs brushing against the bite marks.

He doesn’t know what worked, whether it was his venom, the feel of him inside pushing his come in and out, or even the use of the pet name, but Katsuki’s body melted against his.

“Such a good alpha,” Shinsou praised, still sliding in and out slowly. God, Katsuki’s ass felt good.

It would take maybe another round after this to even get his Command to work before it was safe to slide out. Anytime before that would cause Katsuki’s alpha to snap out and not only tear him into shreds, but maybe burn the entire building down.

But it was so worth it all.

And maybe, once they were safely inside Katsuki’s apartment & out of their ruts, they can talk about what happens next.

He knew he would have hell to pay for the Claim Mark & knew Katsuki would mock him endlessly for obviously wanting to Mate him forever when he acted otherwise.

But Katsuki was worth it. Has been since the day he called Shinsou an extra and pushed pass him back in high school.

Shinsou had wanted him then and wanted him now more than ever and it seems that Katsuki very much wanted the same.

All it took was a jealous induced rut.

🤍