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Hitoshi watches as Katsuki walks by, his pro-hero ripped at the collar, among other places, after the nasty battle that happened in the inner city. He watches Katsuki wave off medical staff and reporters when they spot the cuts and bruises on him, but they all look superficial.
Except the massive, hand size bruise around his neck.
Hitoshi sees it, sees how big it is. The medical staff buzzing around him tell him they can fix it, let them look at it, but he, in not so polite terms, shoves them off. That the ‘villian didn’t do anything worse than this, I’m fine’.
Hitoshi wonders at the attention he’s getting, the cameras flashing, the reporters trying to get something from him. It’s not uncommon for him, it seems, to be used to it as a top ten hero.
But Hitoshi can’t help but focus on the bruise. Better yet, the lie he just told to everyone that the villain banged him up.
Because Hitoshi knows what that bruise looks like. Has seen it himself, and has seen it on others– one’s he’s given. That bruise isn’t from fighting, it isn’t from a villain.
It’s a marvel, the discovery he witnesses on Katsuki’s bare throat. He likes to be choked.
Hard enough to bruise.
Hitoshi can’t help but be immediately irritated at himself for the spark of jealousy he recognizes. There was no reason for him to feel that way, they don’t talk to each other outside of the occasional friend outing and hero work.
But. Hitoshi can’t help but see the fleeting images of some no-name asshole giving Katsuki these bruises. Not taking care of him like they should. It’s common decency to not go so hard, especially on someone like… well. Like Katsuki.
But maybe he likes it like that? Maybe… Katsuki would like it with him.
Hitoshi shakes his head of these thoughts, knowing they weren’t going anywhere. That wouldn’t ever happen– and he knows that.
As he is offered off the scene of duty, he can’t help but wonder who’s giving Katsuki these bruises, though. And why Katsuki is letting them.
***
It happens a week later. Hitoshi is on patrol, and he doesn’t realize that he’s standing on a roof across from Katsuki's apartment. Curious, he looks across the way since the windows are open because it’s a nice night. Hitoshi sees the flash of blond from the way and knows it’s Katsuki getting ready for bed, watches him in the low light, showered and fresh as he’s crawling under his sheets.
Hitoshi, suddenly overwhelmingly hot under his capture weapon, looks around to make sure no one else is seeing him watch because he’s supposed to be on patrol dammit– but there’s something so attractive about how Katsuki sits by the light with a book in hand, night readers on. The urge to move closer has Hitoshi peering over the edge of the building.
And, without thinking, he trapezes his way over the be closer to Katsuki’s window, watching.
Hitoshi knows this is wrong, knows this isn’t someone who would appreciate the breach of privacy, but Hitoshi can’t help himself in admiring the way katsuki looks, all sleepy and quiet. A side he doesn’t normally present to the public that has Hitoshi fascinated in a way. So he stays for a little longer, the shame eating at him just enough for him to turn away minutes later.
Until— there’s a moment of movement, and Katsuki’s hands go under the sheets as he drops the book to the side, eyes closing as he slumps further into the bed, and oh.
Hitoshi is watching—
He should look away. He should, but he can’t, he can’t and he won’t because he’s been so curious about Katsuki in bed. The bruises have made a mark on his dreams and his own bed, much to Hitoshi’s disappointment, but this just adds fuel to the fire. His curiosity peaked too high for him to look away.
And now Katsuki is touching himself, without knowing there’s a voyeur, and he’s doing what would please him, something so vulnerable to have an audience for.
Hitoshi learns so much in that moment. Katsuki likes it slow, likes it soft. Likes when a hand trails over his abs, up and over his skin, so light that Hitoshi shivers in the wake of it.
But the hands shift, the clothes move, and now Hitoshi has a full view as the sheets are discarded, a hand carding into his hair as the other holds the base of his cock. Hitoshi’s breath is taken away as he watches Katsuki hold himself in his hand so tight as he pulls at the base of his hair, a complete one-eighty than before.
Hitoshi can’t look away, not even caring that he's on patrol or that this is wrong and he should be ashamed when he’s looking at something so… tantalizing. Katsuki likes his hair pulled. Hard. Makes a sound when he does, and Hitoshi wishes to never forget that sound.
Then he starts moving his hand faster, and Hitoshi can hear the faint, faint sound of wet skin, sloppy but finessed- like Katsuki does this type often, soft and then hard, nice and then mean, and his hand that’s in his hair traces over his neck— Oh.
Hitoshi has made the connection of those bruises. The way they were shaped, and he knew it was from something like this, but he didn’t think. God, he didn’t think that Katsuki was doing that to himself. craving it that badly that he bruises.
But he does just that, squeezing.
Hitoshi hasn’t ever been as envious of two hands as he is in this moment, wanting to know how wet Katsuki is from pre, how his neck would feel constricting with muscle, how Katsuki's eyes pinch shut hard from the lack of oxygen, tiny gasps and noises choking out of him.
And then. Hitoshi witnesses the most mind melting thing he’s ever seen—Katsuki arched, his face going slack and his hands shaking with the force of his orgasm, shudders with the wake of it rocking through his body. He slumps, panting.
Hitoshi is as if he just ran a marathon.
He catches his breath, the chilling sensations of his body coming to the forefront of his mind, but he doesn’t move.
Because then, as Katsuki gets up to clean himself, walking about his room as he does, he makes the last stop to the window.
And looks straight at Hitoshi.
Hitoshi can’t even do anything but freeze, caught completely red handed.
Katsuki closes the window, turns the lights off, and gets in bed properly.
Hitoshi sneaks off once he realizes how long he had stayed, heart beating fast, and wonders at the trouble he just walked himself into.