A/N: Hey all, I feel bad for the lack of updates. The reason this has been fairly inactive is because 1) I've been writing more multi-chapter fics, and 2) Most of the oneshots I've been writing lately are smut, and I try to keep this collection mostly SFW.
But I feel bad for the lack of updates, so have this smut oneshot from October. If you guys want more smut, I'll share it if you so desire.
I hope you enjoy ♡

~~~

A fuming redhead with hands balled into fist slams open the doors of Port Mafia boss Dazai Osamu's office, and after him enters the white-haired boy with a stack of papers. The boy places the stack on his desk and bows his head before the deviously grinning boss, who places his foot on the desk and rests his head against his hand. "Thank you," he says, tone dark. "To what do I owe this visit?"

The white-haired Mafia grunt opens his mouth. "I came to—"

"No, no~" Dazai scolds, wagging his finger side to side. He chuckles, shoulders bouncing just a bit. The sound is patronizing and condescending to both of the other people in the room. "I wasn't asking you, Atsushi-kun, but thank you so much for your diligence. Chuuya?"

Dazai's redheaded right hand man growls and punches the door, causing it to swing on its hinges and shut, and he stomps over to Dazai's side. He crosses his arms and sways his hips, gritting his teeth. He'd argue with Dazai making him report on this instead of Atsushi, the one who is visiting, but knows Dazai will give him a bullshit answer, so he follows orders. "The weretiger came here to drop off finished paperwork. That's all. Do you want a fuckin' essay about it?"

Dazai takes his foot off of his desk and leans forward again, putting his hands together on the desk, giving Chuuya a knowing, evil grin. "That sounds quite nice, actually. Why don't you do that after you file Atsushi-kun's paperwork for me~?"

Atsushi observes the anger the forms on Chuuya's face, and he puts his hand up, wanting to soothe some of that. The redhead is utterly terrifying when he gets angry. "It's okay, Dazai-san. I-I can file my own paperwork."

"I believe I gave Chuuya an order, Atsushi-kun~" Dazai purrs. "Now, your business here is done. Move along now."

Chuuya feels his blood begin to boil. His hand slams down onto Dazai's desk and his fingers curl into the wood, activating his ability so his gloves fingers sink into the wood, clawing at it. "Get the fuck out," he adds. "I have some business to tend to now. And what did I fucking say about calling him 'Dazai-san'? You call him boss. Got it?"

"O-okay, I got it, I got it," Atsushi says quickly. And he spins on his foot and practically runs out of the room, not wanting to know what Chuuya's "business to tend to" was.

Dazai watches the door open and close once again, then laughs to himself. He leans back into his chair and crosses his arms over his chest. "My goodness, Chuuya. That was quite rude of you. Now, how about you get to work? Oh, wait just a moment, there's a bug!"

Dazai smacks the tall, neat stack of paperwork on his desk, knocking almost all of it on the floor, sending papers everywhere, scattered about. Of course, there was no bug there. He did this completely on purpose.

Dazai puts a hand to his mouth innocently. "Oopsie~!" he says. "Won't you clean this mess up for me, Chuuya? Make sure to organize it, too. Can't file it if it's all out of whack~"

Chuuya's anger bubbles over, as if his boiling blood were a steaming pot spilling out on a stove. However, unlike the fire beneath that pot, Chuuya's fury will not be so easily quenched. His fingers in the desk curl into a fist, breaking a chunk of wood out of the table with a loud crack.

Dazai tuts at this, shaking his head. "Hmph. Naughty, naughty Chuuya. How could you break your boss's desk? You're going to pay for a replacement. I don't want to get it repaired, I refuse anything less than flawless."

In response to that, Chuuya throws the chunk of wood at Dazai's head, hitting him right above his ear. He relishes the exclamation of pain Dazai lets out when it hits him.

Dazai immediately puts his hand on his head where the wood hit him. "Ow!! What the hell, Chuuya!? This is incredibly naughty behavior! I expect you to nurse me back to full health!"

Both of Chuuya's hands ball into fists. "No," he says darkly and curtly.

"No?" Dazai echoes. He tuts again and turns to look at Chuuya, eyes darkening. He takes his hand off of his head, and instead moves it to hook Chuuya's choker, dragging him closer so they're at eye level. "Are you really going to disobey direct orders from me? Your boss? The demon prodigy? Your partner?"

Chuuya's hand goes to the back of his neck, undoing his choker. Due to Dazai tugging on it, as soon as it comes undone it flies off. Chuuya quickly catches it—then smashes Dazai's head into the desk. Not hard enough to hurt him too badly, just enough to show him he means business. He aggressively fastens the choker around Dazai's neck. "Yes. I'm fucking done with your goddamn disrespect. You think you can treat me like a motherfucking puppet? Like you own me?"

Dazai opens his mouth to retort that, but Chuuya quickly pulls his glove off with his teeth, then sticks two fingers of that now bare in Dazai's mouth, shutting him up.

"Don't you fucking dare answer any of that. I'm going to show you what all this disrespect costs you. You've pushed me beyond my boiling point. And so I'm gonna punish you."

"Punish me?" Dazai says, unafraid, with Chuuya's fingers fish-hooking him. "Why? I'm the boss. I've done nothing wrong. Chuuya's the naughty one. He should be punished."

"I should be punished?! Ex-fucking-scuse me?!" Chuuya exclaims. "All this time, although begrudgingly, I've followed your goddamn bullshit orders, your unfair rules, all of it. I've done all you wanted. I'm done with that now."

"You can't take away my status as boss, Chuuya. And what do you think you're doing, putting your choker on me? That's a symbol of your loyalty and subservience. Are you telling me you're gonna defect?"

"Fuck no," Chuuya bites. "I have zero interest in being boss, and despite my anger, I'm still loyal to a fault. As to why my choker's on you? Well, today you're going to be the subservient one."

Dazai grins, amused that Chuuya thinks he can control him. "And how are you gonna make me do that?"

Chuuya puts his hand back on Dazai's head, his fingers curl into Dazai's hair, and he tugs. "Because I'm gonna correct your behavior in a way we all know works best."

Dazai scoffs. "Really, Chuuya? You think that's gonna work on me?"

"Oh, I could have you fucking crying if I want to. And not out of pain, might I add."

Dazai rolls his eyes. "Hmph. Since you're so confident, go right ahead. I'll be subservient just this once if you can prove that to be true. But if I don't feel this supposed glory you hint at, I'm gonna crack down way harder. I may even buy a leash to attach to your choker as well as a muzzle. Put you even more in your place~"

Chuuya growls and rips Dazai's pants down to his ankles with one hand. "Bullshit. If anything, you'll be the one on a leash after this."

Chuuya quickly undoes his pants. Not only has his anger boiled over, so has his libido, to a certain extent. For ages, he's wanted to bend Dazai over his desk and wreck his ass to show him who the real powerhouse is, to show him why he shouldn't mess with Chuuya or take him for granted.

"Suck on my fingers," he demands as he shoves his fingers back into Dazai's mouth. He's surprised that Dazai immediately does so with no resistance or pushback. The brunette must be quite confident that Chuuya can't possibly correct his behavior, and so he has decided to grant him very brief indulgence before he'll never do so again.

Once Chuuya deems Dazai has lubed his fingers up enough, he removes his hand from Dazai's mouth and sticks two fingers in Dazai's hole. Chuuya notes that it's quite tight. Dazai's probably never been fucked before, he thinks. Judging from the way Dazai twitches from Chuuya's fingers, he suspects his judgment is correct, as well.

"Heh. Sensitive?" Chuuya teases, hoping to get a ride out of his terrific terror of a boss and partner. "What, are you a virgin here or something? Wouldn't think the high and mighty Port Mafia boss would let me have the honor of such a thing."

"Sh-shut the hell up!" Dazai shouts. His voice is a bit squeakier than normal. "Just fuck me! Don't make me wait! I don't need prep, like some l-loser!"

"That so? You think you can take all nine inches of me?"

Dazai scoffs at that. "Oh, please. Like you're nine inches. You're probably not even half that."

Chuuya clicks his tongue at that, and removes his fingers from Dazai's entrance. "Hm, alright. If you insist," he says. He promptly pushes his dick in all the way, pressing his hips right against Dazai's flat, pale ass.

Dazai's toes curl and he throws his head back when he's suddenly filled all the way to the brim, definitely eating his words now. He grips the desk and bites his teeth. "Wh-what the f—the fuck?! Ch-Chuuya, you—ah—why did you keep this a secret?!"

"Like I'd just tell my motherfucking boss how big my dick is. Do you hear yourself?" Chuuya scolds. "Now, shut up. I don't want to hear your goddamn annoying whining and bitching. I hear enough of that when I make a frivolous mistake."

"You'd better make me shut up then," Dazai says.

Those words make the angry fire within Chuuya burn even brighter. Giving him such a threat, such an offer, such a tease—how could he ever refuse? "Oh, you're gonna regret that," he purrs, and he promptly starts thrusting his hips. He doesn't ease into it at all, and immediately starts moving roughly and quickly, and Dazai's body convulses with each movement. Chuuya can tell Dazai's trying to resist, but it's hard to not move when someone throws you into such roughness, like dropping a new fish in a fish tank.

Dazai bites his lip, not allowing himself to moan. Instead, he clings to the desk as Chuuya fucks him hard and pulls his hair. He feels Chuuya smash into the sensitive bundle of nerves inside him with each thrust, and it's immensely overwhelming. "A-ah, Chuuya—wh-huh-what are you—ahhh—"

Chuuya grins at those noises. While he told Dazai to shut up, hearing Dazai's slurred, pleasured speech may be just as rewarding as Dazai's silence. He's surprised how quickly Dazai's brattiness left his body, but then again, Dazai's tight ass has probably never felt anything like this before. Dazai's head is probably empty right now aside from thinking of this feeling. "It's called your prostate. Doesn't it feel good when I hit it?"

Dazai doesn't dignify that with a response.

"See what happens when you don't spout insults and bullshit? Doesn't this feel so good? Isn't it humiliating to know that you, the boss of Port Mafia, are being pleasured by someone else, and you're not the one in control—and you like it?"

Chuuya pulls harder on Dazai's hair, causing Dazai's head to go back even further. His lip quivers and his face reddens as Chuuya nails his prostate with every thrust. He feels his body starts to quake, and he's worried he'll lose grip on his desk and he'll fall off, and then Chuuya will fuck him in an even more embarrassing situation. "Sh-shut up! It's not humiliating!"

"Really? Then perhaps you should let me fuck you at a conference then. Let all your stupid grunts watch as a rail your tight, stubborn ass. Let them see what a little bitch you've become, all because you didn't know how to play nice with someone who could've thought highly of you. Doesn't that sound wonderful, Dazai? Your little worker men watching you get pounded by your right hand man? And who knows, maybe I'll give them a turn at you, too. Let them see how good it feels to fuck the boss."

Dazai gasps at those words, and he squeezed his eyes shut. He envisions Chuuya fucking him at a meeting, and can't help but let out a whine at the thought.

"Then again, I don't think I'd be selfless enough to let anyone else have a go at you. I'd want you all for myself. You're my bitch, after all."

Despite the pleasure coursing through Dazai's veins and the tight grip Chuuya has on him, the brunette has the temerity to exclaim, "I-I am not your bitch!"

Chuuya immediately stops moving at those words. He puts a hand on the back of Dazai's neck, finger sliding in between the choker and Dazai's skin. "Really? You're not my bitch? But don't you want me to keep moving? Don't you want me to wreck your ass? Turn it red with how hard I'm fucking you? You'd be okay with me pulling out right now and leaving you here?"

Dazai clams up at those words, biting his lip. He's far too proud to confess to allowing himself to submit to Chuuya and become his bitch, but also doesn't want Chuuya to stop. He hates that Chuuya was right, and that this feels amazing. He doesn't want Chuuya to stop. He doesn't ever want Chuuya to stop. And if that means he has to pull back on his insults, then so be it. Even so, he refuses to use any words, and so his muscles just clench around Chuuya's dick.

Chuuya gets the hint and grins. "That's what I was hoping for," he cooes, and he immediately starts moving again.

Due to Chuuya's pause and inadvertent edging, as soon as Chuuya smashed into Dazai's prostate again, Dazai comes. He moans far louder than he thought he was capable of, and his back arches as much as it can given the position he's in. As soon as he's ridden out his orgasm, he goes limp.

Chuuya grins pridefully at the state Dazai's been rendered in, and he promptly takes a seat on Dazai's chair, thus pulling Dazai forward into his lap. Dazai's eyes half-lidded and breath labored, he barely noticed. Chuuya loves it. "Heh. You're much nicer to be around when you're quiet."

Not having come yet, Chuuya decides to manhandle Dazai, bouncing him up and down on his dick. Dazai's overstimulated moans bring Chuuya over the edge fairly quickly, and he comes inside Dazai, Dazai putting a hand over his mouth. Fading out of his orgasmic haze, Dazai's realized this situation. He's in Chuuya's lap, being fucked, and just got filled with Chuuya's come. He whines loud. He feels extremely embarrassed to have ended up here. And after he was so self-confident, too. How did he end up in this spot?

"What?" Chuuya inquires. "Feel humiliated? Can't believe you just got railed by your partner?"

Dazai, too embarrassed for words, just nods his head.

"Good. I hope that'll teach you a lesson on what happens when you fuck with me too much. There's a reason why the weretiger ran out of here so fast. He knows how scary I can be when I'm mad. He probably didn't know this was the kind of scary I'd be, though. But I think we can keep it that way."

Chuuya chuckles and puts a hand under Dazai's chin. He gently thumbs Dazai's lip, and Dazai turns his head away. "Hmph…shouldn't Chuuya be taught a lesson about why he shouldn't fuck with me too much, too…?"

"I don't think so. This was a retaliation. But go ahead. If you have the strength to discipline me right now, do it."

Dazai doesn't move, just crosses his arms and growls. They both know he can't do anything right now. "I hate you," he bites, and he goes to take off the choker, when Chuuya puts his hand over it.

"I think this should stay on you for now. So long as you're mine."

"D-don't be ridiculous, Chuuya. I'm not yours. If anything, you're mine. You serve me. You're below me. You're—"

"I'd gladly fuck you again to get those words right out of you. Would you like that?"

Dazai clams up again and his face reddens. "Hmph…maybe later. I'm overstimulated right now…I get it, I get it. You're so mean. If you want me to behave…you'll have to motivate me."

Chuuya grins at that. "I won't argue with that," he purrs as he slips his thumb under the choker around Dazai's neck, now officially belonging to him rather than Chuuya. "I'd love to keep disciplining you."

After sitting there for awhile, Chuuya lifts Dazai up and lets Dazai walk off to go clean himself off, relishing how embarrassed Dazai looked as he scurried off. After Dazai had left, Chuuya rises from Dazai's seat and fixes himself, promptly reorganizing Dazai's desk after everything got knocked off. Even if the balance of power between the two of them has changed, Chuuya's still Dazai's right hand man, and still serves him loyally.

He still loathes that brunette and all he stands for. But now that he's got an edge on him, now that he can discipline him, now that Dazai's the one in the choker—he thinks they'll get along much better now.