Actions

Work Header

No Room for Three

Summary:

Kariage knows things haven’t been going well with Katsuki. They’re coming up on 5 years together and there’s little to no passion left. But he has a plan. On their anniversary, he’s going to propose a threesome to bring some of that fire back.

Kariage doesn't treat Katsuki the best but he's sure a threesome with Katsuki's best friend who he spends too much time with is the solution to winning him back. He hasn't realized the extent of Kirishima's feelings for Katsuki or why he says yes so easily.


Kinktober Day 5: Cuckolding
Check the series tag for the other days.

Notes:

Welcome to my Kinktober 2021! You can check the series to see the prompts. I'll try to update all of them on time, but I do post on Twitter first. Please go through the tags and decide if this is for you. You're making the choice to read this.

Title Card:

Kariage is Bakugou's middle-school friend, the one with the cropped/undercut hair. More information about him can be found in the end notes, including a picture.

Chapter 1

Notes:

(See the end of the chapter for notes.)

Chapter Text

Kariage knows things haven’t been going well with Katsuki. They’re coming up on 5 years together and there’s little to no passion left. But he has a plan. On their anniversary, he’s going to propose a threesome to bring some of that fire back.

It’s a big change. Their sex life has always been tame, some would even call it boring. He takes Katsuki from behind and as soon as Katsuki can tell he’s close, he jerks himself off. He doesn't always finish, but he says "Don't worry your nerdy little head about it, Ri, I just don't have a very active sex drive."

Kariage likes it like that though. He doesn’t need a lot, he has a beautiful boyfriend, all he needs is to be inside him. And it’s sweet that Katsuki takes care of his needs even if he isn’t in the mood himself. Yeah, some would find it boring but he likes the routine of it. Him and Katsuki? They’ll always be the same; two mean popular guys always above everyone else. Well, Katsuki’s under him but that’s just an added plus.

He sighs when he thinks of how little time they spend together now. Before they got together, they used to spend hours trying to one-up each others' scores at the arcade, they’d rule the school together reminding everyone just how powerful they were. Their first date was at the movies. Katsuki had blushed so hard when Kariage had kissed him.

Now Katsuki spends his weekends hiking alone. 

Well, not always alone. Sometimes he takes along that redheaded best friend of his. Kariage had demanded to join them once but they were so intense and weirdly competitive about who could reach the first peak faster. Kariage got there two hours after them, furious that Katsuki had just abandoned him. He didn’t work out like them! He’d pulled Katsuki aside to let him know how he was angry and sure he felt bad seeing Katsuki’s smile disappear but he shouldn’t have taken him along and then just left him.

He’s not sure he likes Katsuki’s friends. They act very high and mighty while being incredibly immature. They’re loud and take up a lot of space and all their hair colors are childish. You’re an adult, you shouldn’t have pink or red or purple hair. Plus ever since Katsuki’s been with them, he gets mad when Kariage tries to tell him funny stories about the loser at work and how they play pranks on the guy. Then he gets really quiet when Kariage reminds him that Katsuki’s the one who taught him those tricks.

He lights a smoke and buzzes his secretary.

“Arrange for a bottle of red, an expensive one. It’s Katsuki and my five anniversary on Thursday, make sure it’s appropriate for that. Get some flowers too. Big, I don’t know. And figure out what’s a good gift.”

“Understood, sir. Would you like me to make dinner reservations?”

“Nah, Katsuki doesn’t like going out much. He’ll probably cook something fancy.”

Kariage looks out his office window. He’s working for his dad’s company so of course, he got the corner office with the amazing view. The idiot friend with the lightning bolt dyed into hair had tilted his head and said nepotism when Kariage told them what he did. Like he’s supposed to just ignore the good that comes his way?

Plus if they had such a problem with it, they shouldn’t spend whole nights in his living room with his game consoles, making up a ruckus and ruining his night. He’d told Katsuki he couldn’t put up with that anymore and they’d gotten into an argument about how Katsuki said nothing when his friends came over and stank up the whole house with smoke and drugs and he always got late to go to his classes because he had to clean up after them.

“We work important jobs,” Kariage had reasoned, “we need to let off some steam. We’re not just getting into our careers like your friends. You’ll understand when you realize your college days are over. Whatever that band stuff they’re doing will eventually fall apart, Katsuki. Come work with me, I can get you a cushy job. You don’t have to study in that strange, smelly lab.”

That was last week. Katsuki had been furious. He spent all weekend hiking and came back just as Kariage was leaving for work on Monday. He barely acknowledged him.

He sighs. He doesn’t like it when Katsuki is mad at him. He’s been lying and saying he was working on his research papers but he’s never been any good at lying so it’s clear that he’s staying out late doing something else. Probably hanging out with his “squad.” Maybe Kariage shouldn’t be so disapproving, he doesn’t want to lose Katsuki to people who think feelings and music and bullshit is important.

He has a plan for Thursday. His friend Mikey told him that his wife and he had a threesome on their recent vacation and now their relationship was better than ever. He could do that. He doesn’t mind sharing Katsuki.

The next two days pass in a blur. Work keeps him busy and other than a quick blowjob Katsuki gives him, there’s barely anything between them. His secretary delivers the present, flowers, and wine to his office but a meeting runs overtime so he’s late getting home.

Katsuki’s asleep on the sofa in slacks. The table is set for two with the nice china and beautiful, elaborate candles, now put out. Kariage draws up his shoulders. Poor baby, he looks stunning when he’s not scowling. He strokes Katsuki’s face until he wakes. 

“I’m sorry I’m late, love,” he apologizes.

“It’s fine. Food shouldn’t be too cold. I made steaks, they're in the oven, and there’s a dessert bowl for later.. I was going to get wine but…” Katsuki murmurs while rubbing one eye.

“Yup, I got the wine and some gorgeous flowers for my pretty boo,” Kariage winks.

Katsuki blushes and snatches the items from him. Five years and he’s still shy, Kariage thinks with a laugh.

They have a nice dinner even if the conversation is a little stilted. At least the bitterness from earlier is gone. He gives Katsuki the present, an engraved keychain with the date they got together. Katsuki thanks him with a kiss. Kariage waits until Katsuki’s tipsy before he corners him and kisses him hard.

“Mmph!” Katsuki cries, pushing him away, “what’s gotten into you?”

“What? I can’t kiss you now?”
Katsuki shakes his head, “of course, you can. I just don’t know why you’re being so aggressive.”

“Five years, love. Isn’t that amazing? Did you imagine us here all that time ago when I first asked you out?” he asks with a smile and then frowns when he notices Katsuki’s eyes dull. This isn’t good. He needs to fix things quickly.

He asks if they can go to the bedroom and to his delight, Katsuki finishes off his glass of wine in one go first. The drunker he is, the better for him.

Their sex is regular. Katsuki had already prepped himself so they can skip that and he slides into that tight, wet heat with a groan. He chances a smack at Katsuki’s ass and Katsuki turns his head to glare at him. Fine, he mumbles to himself, no fucking spanking. He fucks him fast and quick and Katsuki holds himself on his knees and arms.

He tries turning Katsuki’s head for a kiss when he cums but he guesses Katsukis’ too tired because he just collapses instead. Still, he nudges Katsuki until he rolls over to look at him, eyes glazed over, sleepy and drunk.

“Let’s have a threesome. It’ll be fun,” he whispers. Katsuki is shocked, almost scandalized, and immediately says no and then passes out. Kariage lights a cigarette.

Kariage doesn’t bring it up again in the morning, letting him think it was a product of too much wine and nothing else. He should’ve known it wouldn’t work. Katsuki is too dry. He doesn’t know how to have fun.

He sighs and puts the backup plan in motion. An elaborate anniversary party atop Hill Tower, the tallest building in Musutafu. He loathes to invite Katsuki’s ruffian friends but he doesn’t want to antagonize him even more.

It’s an elegant affair, black-tie, lots of champagne, floral arrangements, and a jazz band. His friends come up to him and Katsuki and congratulate them, winking at them and telling Katsuki he’s real lucky to have kept Kariage this long. He laughs awkwardly and Katsuki’s brows furrow.

“What did that mean?” he asks quietly.

“Nothing, baby. Don’t think about it. They’re just being assholes,” Kariage scratches his head and pulls out his cigarettes.

Katsuki makes a face and mutters that he’s going to go get more champagne. A few minutes later there’s a commotion at the door. He figures it’s Katsuki’s friends and he’s about to go tell security to warn them to keep it down when Mikey throws an arm around his shoulder, “dude, you didn’t tell me you know Riot!?”

“Who the fuck is Riot?” he asks, annoyed. Does he look like someone who’d associate with someone called Riot?

“You’re such a square sometimes, Kariage. It’s an up-and-coming band. They’re rising to the top of the charts real quick. The redhead is the lead guitarist. Quite a player apparently and looking at him, I don’t wanna be straight anymore either.”

Kariage huffs. Okay, so the idiot brigade isn’t doing terribly. He sees them jump around Katsuki and smack his back. Katsuki rolls his eyes and shouts at them, but he looks playful doing it. Kariage misses when he got to see that bratty side of him.

The redhead picks at the tie Kariage forced Katsuki to wear and to his outrage, undoes it. He pulls it over his own neck and pops open Katsuki’s first button. Kariage pushes across the crowd to get to them, missing the grateful smile Katsuki gives him.

He stops in front of the multicolored group and they pause what they’re doing to stare at him. No one speaks for a few seconds and there’s an odd tension in the air. He knows they don’t like him and he sure as fuck does not like them.

“Kariage, congratulations, my friend,” the redhead steps forward, tie dangling from his neck, big, fake smile on his face “we hope you’re keeping our Katsuki happy so far.”

“Kirishima, I’m glad you could make it,” he grits his teeth but says it because Katsuki’s eyes swing between them.

The pink-haired girl throws her arms around him and he nearly suffocates in the scent of candy and tulips. Before he can push her off, two more people hug him. There’s light laughter behind him and he knows it’s his own friends.

“Oi, fuckers, behave yourself,” Katsuki barks out and they finally let him go. He heaves a sigh of relief and then stares in shock as Katsuki allows them to pile up on him instead. He’s laughing. He doesn’t remember the last time he’s heard Katsuki laugh.

He shakes his head and walks away from them, needing a drink and smoke. He finds his friends and follows them to the bathroom for a little white fun. Katsuki’s letting loose so he can too, right?

The party dwindles down till it’s just his friends and Katsuki’s. His tell him they’re headed to a strip club if he wants to join and he nods and says he’ll be along after saying goodnight to his sweetheart.

He already feels so much better. He joins Katsuki’s friends on the sofas they’re gathered on, not bothering to participate in the conversation. He picks up on how forlorn Katsuki looks as the redhead jokes about his last hookup and how he put the guy through the mattress. The pink girl laughs and asks if he makes them call him daddy or it just happens. Katsuki looks away and sips on his drink.

Kariage knew then he was right to push on the threesome! His boyfriend clearly wants a more interesting sex life, once they got that, they'd be back to normal. The other blonde slinks up to him and asks what’s up, probably in an effort to be polite.

“I wanna mix it up,” he says suddenly. His tongue’s loose and he hopes this doesn’t fuck him over but Katsuki just looks so good. He’s taken his jacket off and his dress shirt hugs his fulls pecs and tiny waist just perfectly. His thick thighs bulge under the slacks and his pretty mouth is all pouty. Who better than Katsuki’s friends to guide him on this?

“Mix it up?” the guy asks with a raised eyebrow.

“Sexually. I don’t want to be bored or have Katsuki bored, you know? A threesome maybe? Katsuki hasn’t been very receptive so far. What do you think?” he slurs the words a little but manages to keep his voice low. Katsuki would straight up kill him if he overhead this. He likes to keep his sex life very, very private.

Oh.” the blonde turns to give him his full attention, “I don’t think it’s a bad idea at all but don’t you think you should ease him into it?”

Kariage makes a questioning sound.

“Like for example,” he continues, “if you were to go with someone like Kirishima? We all know he’s great in bed right? And there’s no one Katsuki trusts more. He might just agree to that.”

Kariage frowns. The redhead? He doesn’t like him, he seems like an idiot.

“I’m sure it’ll make Katsuki happy and you guys would probably be good after that. I don’t know. I don’t think he’ll agree if it’s anyone else, even like me,” the blonde finishes with a laugh.

He can put his distaste for the guy aside, can’t he? It’s for the sake of their relationship. He looks at Katsuki again. He looks so sad. And he looks at Kirishima. He gets what Mikey was saying, the guy is really hot. Yeah, he can do this.

Just then pinky ends up spilling her drink all over Katsuki and he gets up with a shout. The black-haired guy rolls his eyes and makes them both move so he can help clean them up in the bathrooms. The blonde looks between him and Kirishima and says, “I think I’ll go keep an eye on them.”

“Denks,” Kirishima says looking very confused, but the blonde (Denks?) shakes his head and points towards Kariage with his eyes. Kariage’s own widen. Already? Denks wants him to bring it up already? He takes a deep breath. No time like the present, right?

“Uhh?” Kirishima looks at him questioningly.

“I’ll get right to the point,” Kariage says, pulling his businessman persona right to the front, “I want to have a threesome and Denks has convinced me you’re the perfect person for it.”

Kirishima stares at him, opening and closing his mouth in shock.

“Katsuki will agree,” Kariage adds, “if he doesn’t, we won’t bring this up again.”

There is a glint in Kirishima's eyes he doesn’t fully understand but it’s gone a second later and the redhead is giving his signature sharp smile and telling him "sure, bro, it's manly to help your friends!"

Convincing Katsuki is hard but not as impossible as he thought. He keeps asking him if Kirishima really said yes. And he’s sick of telling him that he did. Looks like the dumb blonde was right. Katsuki does trust Kirishima, even looks a little excited. And if he was a smaller man, Kariage would be upset. But he gets it, the man is like some sex rockstar or something. Katsuki gets a pass. It’s not like Kariage hasn’t had his fair share of late nights with Mikey’s model friends.

They plan for a Friday night when Katsuki has a break in his submissions and exams. He’s nervous throughout the day. Kariage knows he’s shaved at least twice, he’s cooked a lamb roast, and cleaned the house several times over. He grabs Katsuki when he tries to go shower again.

“You’re fine. You’ve already cleaned yourself and you haven’t eaten anything solid and this guy’s your best friend, isn’t he? Relax. We’ll have fun.”

“I - you’re right...I just...should we really do this, Ri?” Katsuki asks, chewing on his lip and Kariage doesn’t understand because Katsuki has never been anxious about anything in his life.

“You don’t want to?” he doesn’t want to push Katsuki but he’s also sick of this. They’re going to have some fun tonight. He can get some drugs out if that helps. Katsuki’s never agreed to them before but things are finally changing, aren’t they?

“No...I really, really want to,” Katsuki whispers.

“Then there’s no problem. Let me know if you want anything to take off the edge,” Kariage says, giving him the option.

“Hah? None of that tonight, Ri! I don’t want Eijirou knowing you do that shit around me. He’ll get mad.” Katsuki commands, all his power and arrogance suddenly back. Kariage rolls his eyes but nods. 

The bell rings. Katsuki stares at him with wide eyes and he gets up to greet their guest. Kirishima smiles warmly at Katsuki behind him and then flicks his eyes to Kariage,

“I got some wine,” he says.

Kariage takes it to put it away and gives the friends a minute. He watches from the kitchen as Kirishima pulls Katsuki into his arms and cups his face. The house is quiet enough that Kariage can hear him ask if Katsuki really wants this and that there’s no pressure, they can just never bring it up again.

Katsuki blushes but shakes his head, “I’m fine, Red.”

“Fine?” the redhead says with a grin.

Katsuki shoves him, “I want this!”

“That’s all I wanted to hear,” Kirishima laughs and Kariage swallows when he realizes the shove did not move Kirishima at all. The man is like a rock. How has he never noticed how much bigger he is than Katsuki? Why is that kinda hot?

“We can go to the bedroom,” Kariage makes his presence known again. He can't be sure but Kirishima looks irritated to see him. Must be his imagination. The guy is literally here for a threesome.

“You want some wine first?” Kirishima asks Katsuki and he shakes his head. Kirishima slips his hand in his and looks at Kariage properly for the first time since he got there, “lead the way then.”

Notes:

Just a heads up, some of the older fics (in Kinktober) have cute art pieces embedded now! Go check them out.

How do you think this threesome will go heh?

Kariage:

the name is given by the fandom and I think it means undercut/close-cropped hair. and yeah, he has a quirk that lets him have sharp teeth, Katsuki has a type, okay?!
More photos here.