Cw: voyeurism
Exhausted + slightly annoyed after a long day at work, Katsuki finally gets home and pushes himself through the front door of the home he shares with his husband.

He doesn't even get his boots unlaced when he hears it.

Eijirou yells.

He trips over himself, heart

pounding in his throat as he scrambles across the living room, almost braining himself on their coffee table in his haste.

He's halfway there before he realizes - Eijirou isn't yelling.

He's moaning.

Time stops and Katsuki's breath catches. Suddenly, the house is quiet again.

The silence turns to static in his ears as he strains to hear another sound, desperate to confirm his suspicions.

He finally exhales, breath coming out in shaky puffs as he attempts to calm his heart and start moving. His body tingles as he switches from a panicked rush to

deliberate, light steps. He doesn't want Eijirou to know he's home. Not yet.

Another moan echoes through the hallway. Katsuki breathes heavily through his nose to avoid letting out an answering moan.

He walks towards their bedroom in a trance, eyes fixed on the

slice of light shining through the cracked door.

Katsuki presses his forehead against the door frame and thanks every god that they recently rearranged the bedroom. The way the bed is positioned now is perfect for this. Katsuki can stand here, in the dark, and watch his (huge,

gorgeous, sweaty) husband sprawl out across their bed and fuck himself. And Eijirou is none the wiser.

The wood feels cool against his skin, in direct contrast to the heat that flares inside him. He melts into it as he watches Eijirou writhe on their sheets.

Ei has both,

fingers shoved inside of him and wrapped around his cock. He bucks back and forth between his hands, making slick, squelching noises loud enough for Katsuki to hear over his own open mouthed panting.

Ei thrusts hard and groans aloud, "Katsuki!"

A different kind of warmth

spreads through Katsuki at hearing his name from his husband's lips. It fills him up from his chest and bubbles up his throat, squeezing tightly.

All these years together and Eijirou still thinks of him like this. Still, he loses track of time thinking about Katsuki, wants to

imagine being with him, fucking and being fucked by him. Still touches himself to just the thought of it.

Katsuki grits his teeth and grips the doorframe to stop from bursting into the room and throwing himself at Eijirou's feet.

Fuck, he loves him so much.

His own cock is

straining in his pants, begging for attention, but Katsuki refuses. This is about Eijirou. He stares, enraptured, eyes never settling, never sure if he should focus on Eijirou's ass, his dick or his stupidly handsome face. He doesn't even think, just soaks in every inch of

Eijirou as he pants out his name.

"Katsuki, Katsuki, oh... Fuck!"

Eijirou cums with his whole body, toes curling, back arching, thighs quivering. Katsuki groans as he watches ropes of cum splatter over his husband's chest and neck, almost reaching his own face.

His own mouth.

Katsuki can't take it anymore. He pushes the door open and steps inside, immediately unzipping his pants and pulling his cock out.

Eijirou startles, shocked out of his afterglow, but his surprise melts to something more michevious when he catches on.

He smirks, "Katsuki, you

nasty man! Where you peeping on me?!"

Katsuki climbs on the bed and settles on Eijirou's lap, roughly shoving his thighs together as he straddles him. He runs his hand down Eijirou's chest to gather the cum and grips himself.

The cum is already cooling but fuck, the slide is

perfect.

He curls over Eijirou and peers down at him.

"Of fucking course I was, do you know how hot you are?"

Eijirou giggles and rolls his eyes. "Uh huh."

Katsuki can feel his orgasm growing embarrassingly face, he gasps out, "Fuck you Ei, I'm serious, fuuuuuuuck."

Eijirou's eyes widen as he watches Katsuki practically strip his cock. His hands grip Katsuki's thighs tight enough to bruise.

"Oh god, are- are you gonna cum, baby? Already?"

Katsuki groans in response. His balls tighten almost painfully and he explodes, adding his cum to

the mess pooling in his husband's abs and between his tits.

Fuck, if he didn't just cum he'd be hard just from one look at Eijirou's chest. He shakes the thought from his head, suddenly too tired to continue that horny train of thought.

He falls onto the bed next to Ei with a

dramatic sigh.

Eijirou giggles and uses the towel he had laid down to clean himself up. Katsuki watches with half lidded eyes.

The warmth from earlier seeps into his bones.

Eijirou stops his cleaning and smiles at him. "You okay, baby?"

Katsuki hums, " 'm great, why?"

"You've got a dopey smile on your face, babe."

Ei throws his towel in the hamper and searches his underwear drawer for a new pair of boxers.

A mundane, normal act but Katsuki can't stop watching.

His voice comes out much softer than he means, "I love you, Ei."

The surprise

on Eijirou's face would be funny in another context. He slides on his boxers and jumps into bed. He grabs Katsuki's face in his hands and stares at him right in the eyes. He replies, "I love you too, Katsuki. So much."

It's too much for Katsuki, he's already overflowing with

emotion. He buries his head in Eijirou's chest, hiding his burning face. Ei's chest rumbles against him as he chuckles and wraps his arms around him. Eijirou kisses his head and whispers, "So sweet tonight, baby."

Katsuki ignores him and presses deeper. He falls asleep to

the rhythm of Eijirou's heartbeat and dreams of a bright smile, a booming laugh and the color red.