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worst behavior

Summary:

dazai gets turned on watching you fight and just can’t help himself.

Notes:

(See the end of the work for notes.)

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dazai already knows you indulge him; you let him get away with more than anyone else ever would. even outside of work, when he’s stripped of the authority that comes from being the youngest port mafia executive, the unspoken next in line for the throne of yokohama’s underworld, you always give into his whines of five more minutes or just one more kiss, i swear.

if you asked him, it was your own fault that he liked you so much; you were addicting. if the port mafia was a black hole where all light escaped, you were a twinkling star, falling from the sky right into dazai’s blood-soaked hands, and he loves you more than he ever thought he could. you weren’t quite an executive yet, but you were good at what you didー fighting.

there were only a few things in his meaningless life that made him less than bored: drinking with odasaku after work, harassing chuuya to tears, and watching you train, or better yet, getting to see you on a mission. his favorite part was that you always looked so, so hot while you were doing it.

he tries to act surprised when you’re both sent to take care of some low-level group, threatening to leak information that they definitely didn’t have. he didn’t really have to come with you on this assignment, it was below his level as an executive, after all, but he went through all of the trouble of leaking the address to one of the mafia’s “hideouts”, ensuring they’d show up at the dingy warehouse. it looms before the two of you, weathered from the salty air of the port, glass windows splintered and broken.

his coat flutters behind him with every giddy step, happily following after you and your little black skirt; maybe if he was lucky enough, he’d get a peek beneath it.

“are you sure you don’t have somewhere else to be right now?” you turn to look over your shoulder, reaching your hand out for him and intertwining your fingers loosely.

“there’s nowhere else i’d rather be.” he swings your arms between the two of you loosely. you only drop his hand to pull the rusty door open, greeted by three men, all expectantly waiting for you.

“my, my,” he whispers against the curve of your ear. “looks like we’ve been caught.”

“what do we have here? a little girl…” one of the men grins, looking at you in a way that made dazai want to kill him himself. the way his eyes drag up your body stirs an instinct to pull you behind him. “…and her guard dog?”

of course, he’d never put you in any real danger. this group was pathetic, and even at three to one, they didn’t stand a chance against you. dazai can predict all of their moves flawlessly anyway, and you have a implicit understanding that he never gives you more than he knows you can handle. his gun remains heavy against his side, always within his reachー just in case.

his fingers instinctively twitch towards the grip as one of the men reaches to grab you, but you don’t let him, seizing him by the forearm, leg sweeping him from behind and tossing him onto the ground. he falls to the concrete with a groan, looking up at you with a dazed scowl. the heel of your foot connects with his jaw before he can make another move, and he falls still against the ground.

one of the other men comes from the side, but you’re still too quick, catching him out of the corner of your eye and dodging with ease. you hit him hard enough for him to stumble, and you take the opportunity to grab him by the throat, knocking him backward. dazai’s eyes widen, the hair rising against the bandages wrapped around his arms and neck; he was almost jealous. the man chokes as you slam his back against the wall hard enough for his eyes to roll back and his body to crumple to the ground.

there’s only one man left, and your lip splits when his fist connects with your face. dazai’s eyes narrow, and the man’s glaze over in frustration as you recover quick enough to dodge his next hit, crouching low. you curl your leg around his waist from behind, pulling him down to the ground by the back of his shirt until he’s pinned beneath you.

you’re quick to get up, and when you’re far enough away for dazai’s comfort, he aims his gun and fires once, twice, then again before the man falls still.

the only thing heavier than dazai’s presence is his gaze, and you feel it prickle against your skin like the sharp edge of a knife from where he’s still standing in the doorway. when you meet his eyes, they’re red and glowing, and locked onto you.

he walks towards you, only the heavy sound of his shoes against the cement and your quiet breaths filling the warehouse. you swipe your thumb across your lip, breaking his gaze to look at the blood smeared into the crevices of your fingertip before dazai grabs your chin, tilting it upward. his tongue is warm as it traces along the cut before he presses it past your lips. your noise of surprise is muffled as he kisses you, the taste of your own blood permeating your mouth.

he walks you backward until the back of your heels hit the edge of the cold, concrete wall. his mouth never leaves yours, tracing the roof of your mouth and the edge of your teeth as if he doesn’t already have every part of you committed to memory. his cock strains against the fabric of his trousers, poking against your thigh as he presses himself flush against you.

dazai,” you try to warn, but it isn’t very convincing, breathed out like a hymn; god, his name has never sounded so sweet. he sings your name back with a smile, groping you through your shirt with one hand as the other unbuckles his belt. he slides his fingers down your stomach until he pulls your shirt out from where it’s tucked into your waistband, flipping the hem of your skirt upward to expose those cute little panties. “we’re still…we’re here. in a dirty warehouse.”

“what’s wrong? there’s no one else around. you made sure of that, didn’t you?” he cups your chin between his fingers again and turns your head towards the enemies, bloodied and unconscious, chests heaving shallowly. he presses a kiss to your jaw, trailing up until his lips rest against the curve of your ear. “did you already forget? when their bloodstains haven’t even set into your clothes yet? i didn’t know you could be so cold.”

he unbuttons your shirt with the flick of his thumb, just enough to expose the curve of your tits, sitting oh so prettily in your bra. he skims his fingers against your panties, stroking the soft fabric where your most sensitive spot is covered. he pulls them aside, giggling against your ear when you’re already wet as he slips his middle and pointer fingers inside of you. your frown falters as he curls them with expert precision, eyelids fluttering in bliss as something achingly sweet ignites in your stomach.

“you know what i was thinking while i was watching you?” he drops his voice low, watching the way you sink your teeth into your bottom lip when he finds your clit, grinding the heel of his palm against it in pressured circles. “‘i wonder how it’d feel for her to choke me like that…to wrap these pretty little fingers around my neck and squeeze’.”

the lingering adrenaline of a fight and dazai’s body pressed so close to yours makes you feel dizzy. you part your lips to reply, but his hand is back on your jaw before you can respond, brushing his mouth over yours teasingly.

“do you have any idea what you do to me?” the pad of his thumb is cold against your warm cheek. he strokes himself with the slick collected on his fingers, pressing into you with the tip of his cock. his bangs fall over his eyes as he hangs his head and watches you stretch around the shape of him, disappearing inside your warm cunt inch by inch.

your nails dig into his arms, feeling his lithe muscles tense through the expensive fabric of his coat. he pries your hands off, fingers wrapping around your wrists as he pins them against the wall, holding them in place with one hand. his grin bites against your neck as you throw your head back and arch your hips instinctively.

“my good girl,” he breathes, sucking the skin beneath your ear between his teeth, soothing it with a kiss when you whine. “my sweet, perfect girl.”

“mhm,” you exhale, your own breath getting caught in your throat. your back is pressed against the cool cement behind you, with dazai’s firm chest flush against your front. the broken window above you pools sunlight over your half-dressed bodies. “yours.”

you feel his uneven breathing against your skin as he presses his lips against your jaw. his cock rubs against you deliciously, velvet walls fluttering and clinging to him each time he pulls his hips back. it’s so easy to melt into him like this, with the security of his hands against your skin, his soft hair tickling your neck, and his cock filling you perfectly, like you were made for him to take.

he lifts your leg, fingers squeezing the plush of your thigh and supporting your weight. he thrusts inside you at a new angle, hitting the slightest bit deeper, but it’s just enough to make you gasp as your belly flutters and your knees nearly buckle beneath his palm as he holds you up. your hands clench around nothing, nails digging into your palms in a desperate need to hold onto something.

“the way you threw that man and pinned him to the ground,” he whispers. “would you do that to me?”

no,” you’re breathless, words lost on you as your mind clouds over with pleasure. his hips grind against yours, the head of his cock kissing the deepest part of you as your eyes roll backward. “i don’tー i’d never hurt you.”

“but i’d let you,” he rasps. “you could do whatever you want to me.”

he lets go of your wrists, and you bend your leg around his waist, trying to press him even deeper. you balance on your tip toes as he thrusts into you harshly, curling your arms around his shoulders, as if his cock nestled inside you wasn’t close enough; it was never enough when it came to dazai.

“fuck,” your voice is breathy and broken, and it echoes throughout the gutted warehouse. the heat building in your stomach is already overwhelming, rushing to your head until you feel drunk on it. your muscles are taut, toes curled as you feel him throb inside you, his hips stuttering. “osamu.”

his grip on you tightens, and he whines; it’s just barely audible, and you would’ve missed it if he wasn’t right next to your ear. your eyes are hazy, half open as you look at him through your lashes as he watches the way your tits bounce against the fabric of your bra in time with his movements.

your hand trembles as you lift it, closing your fingers loosely around his neck and pulling his gaze back to yours. you can’t help but grin, lips curving up into a drunken smile as you watch his cheeks flush a pretty pink and his eyebrows furrow in pleasure. dazai rarely expresses his emotions so openly, and you commit it to memory as best you can through the fuzzy feelings of bliss blurring the edges of your mind. he lets out the prettiest noise, something between a moan and a cry vibrating against your palm, his cock throbbing inside you as you squeeze his bandaged neck.

his thrusts grow sporadic, breathy moans growing in volume. his nails dig into your hips, and you rub your clit desperately, quivering in his grip as you feel him stall and cum, warm and deep inside you.

everything fades to static as the sweetness in your belly burns brighter and brighter until it finally explodes into white, hot, sparkling pieces that pierce your vision. dazai pants and hangs his head, but his eyes snap to yours as you mumble something close to “cummingー”, always so desperate to take in the pretty way you fall apart for him, because of him.

he whimpers when you draw your hand from his throat to his face, brushing his bangs away from his eyes. you cup his cheek, smoothing your thumb against the tape holding his small patch of gauze in place as you breathe in one another.

your legs ache, tensed muscles finally relaxing as you lower your foot back to the ground unsteadily. your head falls against the wall with a final sigh, chest heaving. dazai is beaming at you when you peek your eyes open after a few moments, looking irritatingly adorable with his messy hair and crooked tie.

“i can’t believe we did that here,” you glance towards the pieces of shattered glass that litter the ground.

“you loved it,” he smiles, brushing the tip of his nose against yours. “you love me〜”

he pulls out of you carefully, snapping your underwear back into place. you grip his tie, wrapping it around your hand and pulling him in to press your mouth to his before straightening it and sliding the knot back into place.

he pouts as he watches you start to button your shirt back up, squeezing your waist softly.

“can’t you leave some open?”

your glare is weak, and he meets it with a smile. he slides his coat off his shoulders, draping it over your own to hide your wrinkled clothes.

“i’ll call a car to get us,” he hums, slipping his hand into your own as he guides you outside the warehouse. “i’ll even give you the rest of the day off for a good performance!”

you rest your head on his shoulder, sleepy and sated. the breeze is cool on your warm skin, carrying the scent of the sea as it gently brushes through your hair.

“you know,” he starts, typing away at his phone, still as happy as ever. “you still owe me lunch from losing that bet last week.”

he has another tease on the tip of his tongue, but he falters when he sees the red splotch of blood staining your pouted lips. he slips his hand beneath your chin and tilts your face towards him. he frowns at the cut, visible eye narrowing as he brushes his thumb against the corner of your mouth.

you wrap your hand around his wrist loosely, pulling it back to press your lips to his palmー i’m okay. he sees one of the mafia’s black cars pulling in from the corner of his eye, and presses a lingering kiss to your foreheadー i know. he pulls the lapels of his jacket tighter around your shoulders before he slips his hand back into yours, and when he walks you to the car, his coat flutters behind you.

Notes:

thank you so much for reading!! ᰔ ˖ ࣪⊹