Thread by @An_Aphorism

#prekerb #nsfw authority kink, praise kink, light dom/sub

Young Keith who loves sparring with Shiro. It’s *shiro* he’s so amazing and strong and everything Keith wants to be, even if for now he’s small, a little unskilled.

A loss on the mat doesn’t sting that badly when

it’s Shiro, sweaty and grinning who pins him down.

Keith picks up a habit of... relieving himself in the shower afterwards. He imagines Shiro a little bit different, a little bit... darker. A Shiro who would pin him down and slide a palm across his halfhard cock

then grin meanly at him. “Unable to help yourself, eh cadet?” Shiro would say in that deep voice of his.

Every fantasy goes a little bit further, gets a little bit more lewd. Eventually Keith can barely get through sparring sessions without getting hard.

..and is it his imagination or is Shiro doing a lot more touching with him? Staying close, hand on his shoulder and then hip, guiding him easily around, especially when they’re finished. The hand burns when it slips around Keith’s waist, helping him to the showers.

More than once Keith’s heart bangs in his chest *sure* that Shiro’s about to join him.

& it only gets worse from there. Shiro starts sparring with him late at night, without his shirt. Training pants become athletic shorts that become tighter, smaller. They’re always alone.

Then there are nights he has Keith underneath all that hulking muscle and suddenly Shiro’s smile is different. Sharp.

Keith can’t tell if it’s his own imaginings bleeding into real life because surely, surely Shiro never would—

Then, one quick and dirty spar

when Keith’s just wrapped his hand around his cock in the shower, Shiro pulls back the curtain.

“Keith.” Shiro’s eyes don’t even move down, they don’t need to. Everything from his tone to his body language tells Keith that Shiro knows what he’s been doing. *Has known all along*

Keith is near quivering beneath that steady gaze, hot and afraid and—

“Let me teach you,” Shiro says, stepping into the shower. He’s wearing paper thin boxers that slide down obscenely when the water hits them.

It’s only his cock, stiffening, that holds them up.

Keith doesn’t even breathe, he’s incapable of it. Incapable of moving too.

When Shiro’s hand moves to his cock, he couldn’t stop him if he wanted to.
He definitely doesn’t want to.

“I bet you do it like a kid still, too hard and fast on yourself, hm?” Shiro’s smile is molten

“But if you just...” Shiro’s hand, huge and calloused, slides slow on Keith’s cock, and Keith’s knees nearly buckle.

He’s not going to last.

“Nice and slow, see?” Shiro’s smile is wicked, his hands worse as they coax Keith to spill.

Sure enough it’s just a few strokes, just a few more filthy comments from Shiro as he narrates just how Keith should be stroking himself, before Keith has completely lost himself.

He’s nearly pinned to the wall, unable to keep himself up, while Shiro takes him apart.

“And here’s one of my favorite techniques,” Shiro whispers into his throat, taking his hand to curve around the head of Keith’s cock, slick and obscene.
Keith loops a desperate arm around Shiro’s neck, hiding his face.

“So close now, aren’t you?” There’s a low, approving hum.

“Come on. I know you’ve been wanting this, been asking for it every night on the mat, looking like that.”

The thought and knowing tone does Keith in. Clenching Shiro’s shoulders he comes, helpless, in Shiro’s slow, steady grip.

Shiro croons into his ear. “Good boy,” as he does, and when Keith’s unable to support himself in the blind pleasure, Shiro helps him down onto his knees in the spray.

“Now,” shiro says, taking his come-covered hand back and wrapping it around his own cock now freed.

“Just stay like that, and I’ll show you a few more things before we’re done.”

Keith, on his knees, can’t help but pant up at him. Just inches away is the head of Shiro’s cock. Keith watches as he begins to stroke.

“Watch closely now,” Shiro says. He moves to box Keith a little more in, the filthy head of his cock just barely missing Keith’s cheek.

Keith can’t help how his mouth drops open. He’s just come, but his body is still a hot knot under Shiro’s words.

“It’s better to draw it out,” Shiro says. “I know you’ve been having quickies in here, but you’ve got to learn to enjoy it.”

His cock is so close to Keith’s mouth, but Keith is frozen, washed over, and he can’t move. He knows, somehow, that Shiro doesn’t want him to.

Instead he whines at a slick stroke that coaxes a hot bead to the tip.

“Patience,” shiro says. His eyes are black, staring down at Keith. “Been thinking about this for a while, so I’m going to enjoy it.”

He does, giving himself a slow, leisurely fuck. Keith’s knees grow

sore but his cock is throbbing, so he couldn’t care less. He keeps his mouth open, trying to tempt Shiro into it.

Eventually it works. Shiro closes the distance and bumps Keith’s cheek, then nose with his cock. Keith groans and for it Shiro angles himself better

to drag the sticky head across his face.

“Please,” Keith begs when it traces his mouth.

A hand slides into his hair, tilting his head back. “You’ve yet to win a spar, do you think you deserve this?”

It’s said a little mean, but Shiro’s cock is then just sitting on

the pillow of Keith’s lips, and Keith’s never been more turned on.

“Please.”

There’s a tutting sound, and then that thick cock is pressing in, sliding hot and unstoppable over his tongue. “Just a little,” shiro says, “but not for you, for me.”

A man of his word, he fucks in deep, nearly gagging Keith, but just a handful of times before he pulls out and fucks his hand again.

And then the hand in Keith’s hair is keeping him close as Shiro grunts and rubs himself against Keith’s face and starts to come.

It’s an obscene finish, spilling all over Keith and in his mouth. It’s all Keith can do to whine and writhe and reach a hand down to get the two strokes he needs to finish himself.

“Fuck,” shiro hisses, looking down at Keith’s debauchery. “You look even better like this.”

Keith licks his lips of the salty spill, trying to make a production of it. Shiro’s hand tightens in his hair.

“Oh yeah?” Shiro’s cock is still casually there against Keith’s cheek, softening but still messy.

“Well then, guess we’re going to need a few more lessons, hm?”

Keith turns his head, relishing the pull on his hair, and kisses the salty tip. He couldn’t agree more.

/END