Chapter Text
Osamu was seething. Furious. Completely fucking enraged.
Not that he was showing it. No. He was always the calmer twin. The one who could hold it all in better.
But he was PISSED.
He didn't want to be. Really, he didn't. What he WANTED was to trust Sakusa. To rely on him. He thought Sakusa would keep his brother safe. He THOUGHT Sakusa fucking LOVED his brother.
Apparently he was wrong. So fucking wrong.
Suna saw the marks first. Angry red chaffing around his wrists.. but he couldn't exactly blame his fiance for not telling him when Sumu lied about where they came from. Volleyball. That was a fucking joke. By the time Osamu noticed though there were more. A LOT more. He had seen them while him and Atsumu were at the tailors getting fitted for suits. Sumu had been taking forever in the dressing room so, being the good twin he was, he barged in to yell at him and tell him to hurry the fuck up.
That's when he saw them though. His wrists, ankles, thighs, chest, hips, you name it, there were marks there. Sure, some were obviously hickies or other love marks but most of them weren't. The angry red streaks across his chest looked like rope burn. The marks on his hips and thighs looked like he was being hit with something. And all the other ones.. well.. he didn't know what the fuck they were but he knew enough to realize they weren't from sex or volleyball.
Someone was hurting Atsumu.
He denied it at first. No surprise there. His brother, as much as he loved him, was a dumbass and always wanted to solve shit himself. He'd tell ya the sky wasn't blue if he thought it was a problem only he could fix. He was stubborn and hardheaded.
Osamu though. Osamu had his ways of getting information out of him. It took a lot of convincing that he wouldn't “overreact” but eventually Atsumu opened up.
“Before I tell ya who it is ya gotta know.. he ain't like.. really hurtin me, ya know?”
Fuckin lies. Osamu didn't believe him for a second.
“It’s all consensual.”
Consensual his ass.
“An’ I wanted him to do all of it, ok? I asked.”
Bullshit. All of it.
“I like it… so don't freak out or get yer panties in a fuckin twist, ok?”
“I won't.” Osamu nodded, giving him a look that he hoped was reassuring enough to get the name he needed.
“They’re all from Omi.”
Bastard! Osamu was going to fucking kill him!
Obviously he didn't tell Atsumu that though. He just gave him another reassuring look and told him that he was happy they could be honest with each other. Then he devised a plan to kill his boyfriend. He picked a perfect time when he knew Sakusa would be home and Atsumu and Rin would both be too busy to notice his absence for a few hours. Then he paid Sakusa a little visit.
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Sakusa couldn't say he was surprised to see Osamu randomly show up at his front door the second time around. He also wasn't the least bit surprised at the interaction that transpired. He knew that at some point someone close to Atsumu would see all of the marks left over from their scenes together and freak out or take it the wrong way. Of course, Suna and Osamu were the two top contenders.
“Sakusa.” Osamu nodded as he answered the door and there were no smiles or formalities this time around. Just jumping straight to the point, “Ya got a sec?”
“Sure.” Sakusa stepped back, letting him inside as he closed the door behind him. Based on the not at all subtle look on Osamu's face, he had a pretty decent idea of what this was about and his neighbors didn't need to see it.
“Just had a question. Have ya been leavin marks on Sumu? Ya know, hittin him?”
“Only when he asks for it.”
The chuckle that left Osamu’s throat was downright dangerous but Sakusa only had a second to process it before Osamu hit him square in the jaw. Ok, yeah.. maybe he could've worded that better. Fuck him apparently.
“Shit!” He hissed, stumbling back slightly and catching himself on the archway leading to the next room. He brought his hand up to his face to check if he was bleeding. All clear.. but it was definitely going to bruise.
Osamu didn't stop though. Not that Sakusa expected him to. Before he could look back up at the brunette, he had already tackled him to the ground and was hitting him over and over. His nose. His cheek. His mouth. Anywhere he could reach. He was definitely bleeding now. Where? He wasn't sure, but that oh so familiar metallic taste was present on his tongue. Osamu straddled his chest as he gripped his hair, slamming the back of his head against the ground. He was seriously going to have the world's WORST headache later.
“Ya like hittin my brother huh!? Leavin marks on him!? Makin him cry!?” Osamu spat, “Fuck you! Stupid piece of shit! Ya told me ya loved him! Ya told HIM ya loved him!”
“I do.” Sakusa groaned softly as Osamu hit him again.
“Fuckin liar!” Osamu growled as he yanked him by the front of his shirt and cocked his fist back.
Sakusa didn't flinch or curl away though. He just stared at him. Waiting for it to happen. Expecting it to happen.
Osamu seemed to realize his own hesitation for a moment as he gritted his teeth and reeled his fist back even more. Sakusa still didn't move though and something inside of Osamu faltered.
“What.. so ya can hit Sumu but ya can't hit me?” He grumbled bitterly, “Ya can't even block me? Ya really gonna sit here an’ let me beat the shit outta ya!?”
“Yeah.” Sakusa answered honestly. Wincing as Osamu let go of the front of his shirt and let his head hit the ground again.
“Why!?” Osamu demanded.
“I’d beat the shit out of me too if I thought I was hurting Sumu. Fuck.. I'd beat the shit out of anyone if I thought they were hurting Sumu.”
“Ya ARE hurtin Sumu though! Ya see all the fuckin marks on him!?”
“From scenes.”
“What!?”
“Sex scenes.” Sakusa clarified, sitting up slightly and immediately feeling dizzy, “You know.. BDSM? Kinky shit? Whatever the fuck you want to call it.”
Osamu's eyes widened slightly as he stared down at him, “...What…?”
“He likes it when things are rough and scary. I would never do anything to make him uncomfortable or seriously hurt him though. I love him.”
Sakusa's voice was so soft and genuine that Osamu almost believed him… almost.
“Yer fuckin with me..” He growled.
Sakusa shrugged, “You can ask Sumu but I'm assuming you already did. Or you can go back to beating the shit out of me if that makes you feel better.”
Osamu had done both already but neither made him feel any better. Still though, Sakusa's excuse was lining up with what Sumu said. That he liked it and asked for it and that it was consensual. If it was a sex thing.. a really rough, kinky sex thing.. then all that would make sense.. but the marks..
“Yer fuckin bleedin everywhere…” Osamu grumbled as he got off of him and disappeared into his kitchen.
Sakusa tried to get up and follow him but he only managed to make it up on his knees before Osamu returned with a box of tissues.
“Thanks..” He mumbled, taking it from him and wiping his face. Osamu was right. He was bleeding a lot.
“Clean yerself up but then yer tellin me everything. Got it?”
Sakusa nodded and stood on shaky legs as he headed to the bathroom. After a minor assessment of the damage, it turned out that the majority of the blood was coming from his nose and a split lip. He was going to be a little bruised up but it was nothing his face mask couldn't hide. Well.. except the potential black eye but that was yet to be determined. He'd have to wait an hour or so to see how bad it really was.
After cleaning himself up and treating his injuries, he pulled on a new pair of latex gloves before grabbing some more supplies and heading back to the kitchen. Osamu was waiting for him at the dining table and he took a seat across from him.
“Give me your hands.”
Osamu hesitated for a moment before complying and Sakusa cleaned the remaining blood off of them before putting some ointment on one of his knuckles and wrapping it in clean gauze.
“Ya do this fer Sumu too?” Osamu grumbled bitterly.
“Sumu isn't covered in blood afterwards.. but if you're asking about aftercare then the answer is yes. Always.”
“The fuck is aftercare?”
“Water, snacks, cuddling, cleaning up, making sure all of those marks are treated properly so they heal better. You know, basic stuff.”
“Basic my ass..” Osamu huffed, “Why do ya do it?”
“He likes it.”
“So ya jus’ listen to his dumbass, huh? He don't know what’s good fer him.”
Sakusa rolled his eyes, “Trust me, I know. If I blindly listened to every request he wanted, you REALLY would have killed me.”
“....What do ya do to him then?” Osamu asked softly. Part of him was scared to know.. but he felt like he needed to.
“A lot of it is just tying him up and scaring him or having sex with him. He wouldn't have half those marks if he didn't struggle so much against the restraints but he says it's part of the fun. I've been meaning to get him some softer ones so they don't chafe so much. The rest of the marks are mostly from impact toys. A few are hickies.”
“What are impact toys?”
“Paddles, whips, a belt, things like that. Basically anything that you can hit someone with.”
“So ya do fuckin hit him..” Osamu huffed, glaring at him.
“Are you telling me that you've never smacked your fiance's ass?” Sakusa questioned, raising an eyebrow.
“That's different.”
“Hardly.”
Osamu wanted to argue but he couldn't deny that there had been times where he had left bruises on Suna too. Slapping his ass a little too hard or gripping his hips too roughly.. not to mention the borderline obscene amount of hickies he had left on him over the years. All that was different though, wasn't it? It wasn't like he was doing it to hurt him.. and besides, Suna usually enjoyed it.
“I like it… so don't freak out or get yer panties in a fuckin twist, ok?” Atsumu's voice rang out in his head, making him feel guilty and weird.
“Why do ya do it?”
Sakusa looked up at him for a moment, “I told you. Atsumu likes-”
“That ain't what I mean.” Osamu shook his head, “Why do YOU do it? Whaddya get outta it? Ya don't jus’ like hurtin him do ya?”
“Obviously I don't like hurting him.” Sakusa scoffed as he got up to wash his hands and throw away the used tissues and gloves.
“Then why?”
Sakusa was blushing when he sat down again. Despite that though, he still looked Osamu straight in the eyes as he carefully folded his hands together, “I’ll make you a deal. I won't tell Suna or Sumu that you attempted to kick my ass-”
“Oi! ‘scuse ya! I DID kick yer ass!”
“I'm pretty sure my baby niece could have done a better job.”
“Fuck ya-”
“Regardless,” Sakusa cut him off as he continued, “I won't tell your brother or your fiance as long as you don't tell ANYONE what I'm about to tell you. Deal?”
“What makes ya think ya got any room to negotiate here, huh?” Osamu pouted, crossing his arms.
“Would you rather me be honest when my boyfriend and employee both inevitably ask what the fuck happened to my face?”
“...no…” Osamu mumbled. “Ok fine! I'll keep my mouth shut.”
“Good.” Sakusa nodded.
Truthfully he didn't actually care whether or not Osamu kept his mouth shut. It wasn't like the brunette was going to blast it all over the news. Really the only people he'd probably tell were Atsumu (who already knew), Motoya (who also already knew), maybe Kita (if Motoya didn't already beat him to it), and Suna (who he didn't care if he knew). What he really cared about though was reassuring Osamu and letting him know that he wasn't going to outright snitch on him to the people he cared about.
Obviously saying ‘I don't actually care enough about the few minor injuries you gave me to cause drama and tension in your family’ would probably just irritate or confuse him so making it sound like a deal was better.
“I'm a pleasure dom and a voyeur..” Sakusa admitted. “Sumu might tell you that I flip flop between being a sadist and a masochist but the truth is I don't find any pleasure in inflicting pain unless the other person is REALLY enjoying it.”
Osamu stared at him like he was speaking a completely different language, “What? Ok wait.. back up. What the fuck is a pleasure dom?”
“Long story short, it means I get off on controlling when and how my partner cums.. or how many times they cum.. or if they get to cum at all.”
“Ok..” Osamu nodded, taking the information in, “Sounds kinky.”
Sakusa deadpanned, “All of this is kinky. That's the point.”
Osamu rolled his eyes, “What's a voyeur?”
“Someone who gets off on watching people do sexual things like undressing, masturbating, or having sex.”
Osamu nodded again, “A while ago Rin said a masochist was someone who likes pain.”
“Correct. And a sadist is someone who likes inflicting pain.”
“But ya don't like that part..” Osamu recalled, “Unless yer partner likes it.. but I guess that would go back to the whole pleasure thing or whatever.”
Sakusa nodded, “Exactly.”
Osamu took a deep breath and blew it out slowly as he ran his hand through his hair, “So what yer sayin is ya and Sumu are jus’ a couple of really kinky freaks?”
“Basically.”
The silence between them stretched on as Osamu kept thinking about it. He wanted to talk to Sumu again to make sure he really was ok and not being actually hurt but as it stood, Sakusa seemed completely genuine. Sure, he didn't think his brother was that much of a freak in bed but it wasn't like he ever ASKED either.
“Hey Sakusa?” The brunette finally spoke up.
“Yeah?”
“The whole masochist thing… ya weren't like.. gettin off to me hittin ya, right?”
Sakusa scoffed, giving him a disgusted look, “Oh my god!”
“Hey! It's a genuine question!” Osamu protested playfully.
“Get out of my house!” Sakusa grumbled but there was no malice in his voice.
Osamu stood up anyway, though, giving him an apologetic look, “Sorry fer hittin ya though. Seriously.”
“Maybe I'll forgive you for some umeboshi onigiri.”
“Ya got a deal.”
Sakusa walked him to the front door but before he could close it, Osamu turned to him again, “Outta curiosity, ya know if yer cousin is into any of that freaky shit?”
“I swear to god, if you fuck my cousin again, I'm subjecting you to a full, in depth explanation of what your brother looks like tied up and choking my coc-”
“Ok!” Osamu held up his hands in defeat, “I'll jus’ ask him myself. See ya later!”
Sakusa rolled his eyes as he shut the door and started getting ready for his day.