I come back to your inbox humbly asking for an angsty hurt/comfort(?) scenario with Chuuya amd Dazai, basically during a mission or like some agency case an ability user with a mind control ability hijacks Readers body and is basically holding them hostage until Chuuya/Dazai figure out a way to free them(i dont think Dazai can just nullify it by touching reader if we take into account his way of nullifying Qโs ability)
Parasite I Dazai Osamu x Platonic! Reader x Chuuya Nakahara
Summary: Chuuya and Dazai charge in to pull you back from the brink, turning a near-disaster into a reminder that youโre stuck with each other.
A/N: Sorry for taking so long on this one, love! Sometimes life (and stories) donโt move as fast as I want them to. Thanks a ton for hanging in there with me โ youโre the best. Hope you enjoy it!โค๏ธ
TW: This story includes themes of mind control and possession, physical injury, and psychological distress. There are scenes involving a parasitic invasion, blood, and medical treatment. If any of these topics are difficult for you, please take care while reading.
MASTERLIST
They hadnโt expected things to go this wrong.
It was supposed to be a routine retrievalโintel said the ability user was low-threat, known for petty blackmail and mind games, nothing more. The three of you had split off from the rest of the team to corner him in a derelict warehouse on the outskirts of Yokohama. No signs of resistance. No signs of a trap.
Then the screaming started.
By the time Chuuya and Dazai fought their way into the building, you were already gone. Not physicallyโyou were still on the comms, briefly. Just long enough to tell them to turn back, that something was wrong, before your voice warped into something else entirely.
Then silence.
Now, they were running.
The warehouse was coldโtoo cold. The concrete walls echoed with nothing but the frantic drag of footsteps and the low, panicked breath of Chuuya Nakahara as he sprinted through the dark corridor.
โSheโs in here!โ he barked into his comm, boot colliding with the steel door.
Dazai appeared a moment later, his usually unreadable face pulled tight with tension. โWe donโt have time. The longer that parasite stays latched, the more damage itโs doing.โ
โThen letโs move,โ Chuuya snapped, throwing his shoulder against the rusted door.
Inside, they found you.
You stood in the center of the room, still as stone, head tilted at a wrong, unnatural angle. Your eyesโusually warm, so full of fightโwere dull. Off. Watching them with the eerie calm of something that wasnโt you.
โAh,โ your voice cooed, laced with something foreign. โThe mafia's little dogs have come to fetch their pet.โ
Chuuyaโs knuckles went white. โGet the hell out of her.โ
Dazai held out an arm, cautioning him. โThatโs not her talking.โ
You smiled, slow and venomous, and stepped forward. There was a twitch in your jaw, a brief flash of resistance that flickered and died just as quickly. It was like watching a puppet trying to chew through its own strings.
โSheโs fighting it,โ Dazai said quietly. โBut not for long.โ
The parasite wasnโt like Qโs abilityโit wasnโt just about madness or manipulation. This was physical. A parasitic ability, burrowed somewhere inside your body, anchoring itself in your nervous system. Dazaiโs nullification could workโbut only if they exposed the core of the parasite.
Which meant hurting you.
Dazai pulled something small and black from his coat: a stun-needle Chuuya had stolen off the black market last year. โWe donโt have another option.โ
โIโm not hurting her,โ Chuuya said immediately. โYou know I wonโt.โ
โThen I will,โ Dazai said softly. โBut you need to hold her down.โ
You lungedโtoo fast, too sharpโand Chuuya caught you mid-sprint, wrapping his arms around your thrashing form, trying not to hear the animal sounds you made as the parasite fought back.
โIโve got youโIโve got you, okay?โ he whispered, holding on even as your body jerked violently in his arms. โYouโre gonna be fine, just hold onโhold on for me, please.โ
Dazai moved fast. Ripped open the back of your shirt, fingers pressing around your spine until he felt the heatโan unnatural pulse just beneath your skin. The parasite coiled there, near your shoulder blade, squirming at his touch.
โHere we go,โ he murmured.
The blade cut deep. Chuuya flinched as you screamedโyour own voice, this time, not the puppetmasterโs. Your head thrashed, your hands clawing at Chuuyaโs sleeves, but he didnโt let go.
โI know, I know, Iโm sorry,โ he said, choking on the words. โIโm so fucking sorry.โ
Dazai reached into the wound, fingers blood-slick and surgical. Then-
Got it.
The thing squirmed between his fingers, leech-like and black and twitching.
With a flick of his ability, it crumbled into dust.
You collapsed.
Silence.
You woke to soft light and sterile sheets. Your whole body achedโlike fire under your skinโbut you were warm, clean, andโฆ safe.
The infirmary smelled like antiseptic and fresh linen. The steady hum of the ventilation above you was oddly comforting.
You blinked up at the ceiling, trying to steady your breath. Every muscle in your body ached, your back especiallyโan echo of pain radiating from the stitched wound. But compared to what youโd felt before, this was nothing. Just pain. Manageable. Real.
Your fingers twitched under the blanket.
A chair creaked beside you.
โHey,โ Chuuyaโs voice was quiet, hoarse from disuse. โYou with me?โ
You turned your head and saw him slouched next to your bed, one hand buried in his coat pocket, the other clenching his phone like heโd been waiting for hoursโfor days.
Chuuya stood slowly and leaned over you, brushing a knuckle just barely over your temple, like he wasnโt sure if touching you would hurt.
โYou had us scared shitless, yโknow that?โ he muttered, eyes narrowed but wet at the edges.
You tried to speak, but your throat was raw. All that came out was a rasp. Chuuya immediately reached for the water on your bedside table and helped you drink, steadying the glass with a hand that trembled just slightly.
โIโฆ made it?โ you croaked.
โYeah. You did,โ Chuuya said, and the tension in his shoulders dropped just a little.
On the far wall, Dazai looked up from a medical report, arms folded across his chest, expression unreadableโbut softer than usual.
โYou look terrible,โ he said lightly, coming over. โWhich means youโre going to be fine.โ
You tried to sit up and winced. Pain exploded down your spine. Chuuya was at your side in an instant.
โEasy,โ he said, gently easing you back down. โYou took a blade to the back, remember?โ
โI remember,โ you whispered. โI remember everything. I couldnโt move. I was trapped inside my own body. I could hear you both, but I couldnโtโฆ I couldnโt answer.โ
Dazai leaned forward, expression more serious now. โThatโs how the parasite works. Full override. You were lucky to stay conscious at all.โ
You swallowed hard, voice cracking. โI tried to fight it. I did. But it felt like it was digging into me. Like it was part of me.โ
โYou fought harder than anyone else could have,โ Chuuya said quietly. โWe saw it. You slowed it down. You gave us the opening.โ
You turned away slightly, tears slipping past your lashes before you could stop them. โIโm sorry. IโI couldโve hurt you. I wanted to. I wasnโt in control but it was likeโฆ part of me was still trying.โ
โDonโt do that,โ Chuuya said firmly. โDonโt blame yourself for something someone else did to you. You didnโt fail. You made it home.โ
You wiped at your eyes, but Dazaiโs coat was already tossed over you like a blanket, warm and worn. โWeโve all been there. Mind control, possession, psychological tormentโitโs practically a rite of passage in our line of work.โ
Chuuya gave him a sharp look. โMaybe donโt say it like that while sheโs literally full of stitches, dumbass.โ
But you smiled faintly. โThanks. Both of you.โ
Dazai shrugged one shoulder, but he didnโt hide the flicker of relief that crossed his face. โJust donโt make a habit of getting brain-hijacked. Itโs bad for morale.โ
Chuuya pulled up the blanket around you a bit more. โYouโre gonna be out for a while. Weโll be here.โ
โYou donโt have to stay,โ you murmured, though your voice betrayed how much you didnโt want them to leave.
Chuuya scoffed. โNot a damn chance.โ
Dazai moved to the empty cot beside yours and flopped down onto it like it was his personal couch. โWake me up if she tries to dramatically code out again.โ
โReal comforting, jackass,โ Chuuya muttered, but he didnโt move from your bedside.
There was a long, quiet moment.
Then Chuuya leaned forward, resting his arms on the bed rail, close but not touching you unless you reached first.
โYou scared me,โ he said, voice almost inaudible. โAnd I donโt scare easy.โ
You blinked at him, startled. He wasnโt looking at youโjust watching the blanket rise and fall with your breath.
โIโve seen a lot of shit,โ he continued, โbut watching you hurt, knowing you were still in there, trying to get outโฆโ He clenched his jaw. โIf weโd been a minute laterโโ
โBut you werenโt,โ you said softly.
Chuuya finally looked at you, then down at your hand resting on the blanket.
He covered it gently with his.
โNo,โ he said. โWe werenโt.โ
A few days had passed.
Your body was healing, slowly. The pain in your back dulled from white-hot to a deep, manageable ache, and the worst of the muscle spasms had stopped. You could sit up now without helpโthough Chuuya still hovered like a bodyguard with a nursing license.
He was surprisingly gentle with the bandage changes.
โTry not to flinch,โ he muttered as he peeled the gauze away, careful not to tug too fast. โYouโll just reopen the scab if you jerk around.โ
โIโm not flinching,โ you said, biting your cheek. โIโm wincing. Very different.โ
โTch. Donโt sass your medic.โ
โYouโre not a medic.โ
โI am now.โ
Chuuya dabbed antiseptic over the edge of the stitched wound, brows pinched in focus. He looked exhausted, circles under his eyes and a faint scab healing along his neckโyour doing, probably. He hadnโt once brought it up.
You glanced past him, across the room.
Dazai was sitting in the windowsill, flipping through a thin paperback he hadnโt turned a page of in ten minutes. His long coat was draped over the back of your chair, his scarf still hanging from one sleeve.
โWhy are you still here?โ you asked suddenly.
Dazai looked up, surprised. โYou trying to get rid of us already?โ
โI justโฆโ You hesitated. โYou donโt usually stay for cleanup.โ
Chuuya snorted, not looking up. โBelieve me, I was shocked too.โ
Dazai stretched out one leg and tilted his head lazily. โNormally Iโd say something flippantโโI was boredโ, or โthe vending machine here has better snacksโโbutโฆโ His gaze met yours. Calm. Honest.
โYouโre part of the team,โ he said simply. โEven I donโt walk out on that.โ
The words settled in your chest like warmth spreading through your ribs. No dramatics, no false cheer. Just truth, the rare kind Dazai only gave when it mattered.
He turned back to his book like it hadnโt meant anything. โBesides, if I left you alone with Chuuya, youโd be bored to death by his micromanaging.โ
โYou say โmicromanaging,โ I say โdoing it right,โโ Chuuya grumbled, taping a fresh bandage in place. โThere. All done.โ
You sat up slowly and let out a shaky breath. โThanks.โ
Chuuya looked at you, really lookedโhis eyes scanning your face like he still didnโt quite believe you were okay. Then, softly:
โYou scared the hell outta me, yโknow.โ
You opened your mouth, but he shook his head.
โDonโt say sorry again,โ he added. โYou already did. Justโฆโ He reached out and adjusted your blanket without meeting your eyes. โDonโt do it again.โ
You nodded. Quietly. โIโll try.โ
There was a silence. Comfortable, now.
Then Dazai stood, brushing nonexistent lint from his shirt. โSince youโre no longer writhing in agony, I assume itโs safe to bring you real food again.โ
Chuuya arched a brow. โYou mean instead of smuggling in all those horrible convenience store snacks?โ
โIโll have you know she requested those,โ Dazai said airily. โApparently the hospital miso soup was offensive.โ
โIt was,โ you agreed, grimacing. โIโm still traumatized.โ
Dazai smiled faintly and turned toward the door. โIโll be back in ten. Donโt let her escape.โ
โSheโs not going anywhere,โ Chuuya said, nudging your shoulder. โSheโs got stitches the size of a freight line.โ
โStill faster than you,โ you mumbled, and Chuuya let out an incredulous laugh.
When Dazai returned, he brought soup, rice, and some weird sugary drink he claimed would โrestore your will to live.โ
You sat between them, shoulder brushing Chuuyaโs, knees tucked up under the blanket Dazai had thrown over you earlier. No one spoke much, but you didnโt need to.
The worst had passed.
And even though you still ached, even though the memory of that thing inside you made your skin crawl, you felt grounded. Steady. Because theyโd pulled you back, piece by piece. And they were still hereโnot because they had to be, but because they chose to be.
That was something stronger than any parasite. Stronger than fear.
That was family.
The apartment wasnโt big, but it was warm. Lived-in.
Sunlight filtered through gauzy curtains, casting soft gold across the low coffee table and the rumpled blanket someone had tossed over the back of the couch. You sat cross-legged on the floor, nursing a mug of tea that had gone lukewarm while you zoned out watching the steam fade.
Your body still ached if you moved too fast. The wound along your back pulled when you bent a certain way, and your sleep was fracturedโshadows of the parasiteโs control sometimes chasing you into half-lucid dreams. But it was better. Every day a little more of yourself came back.
The TV played something low and mindless. A nature documentary. Chuuya was sprawled sideways on the couch behind you, one arm hanging off the edge, absentmindedly twirling a pen between his fingers.
โYouโre staring again,โ you said, not turning around.
โIโm not,โ he lied smoothly.
โYou are. I can feel it.โ
โIโm just making sure youโre not about to keel over and smash your head on the table.โ
You smirked faintly into your mug. โThat would be impressive considering Iโve been sitting perfectly still for the last hour.โ
โThatโs exactly when people do dumb shit.โ
You looked back at him over your shoulder. โYou can stop hovering, yโknow. Iโm not gonna drop dead on your carpet.โ
Chuuya gave you a look. โThatโs exactly what someone whoโs about to drop dead would say.โ
You laughed, dry but real. The sound seemed to settle something in himโhe shifted down onto the floor beside you, close but not crowding, and took a sip from his own mug. Coffee, probably. Chuuya didnโt do herbal.
โWhereโs Dazai?โ you asked.
โOut,โ Chuuya said, rolling his eyes. โHe left a note that said โDonโt wait upโ and drew a little octopus with sunglasses.โ
You snorted. โWas heโฆ okay? Lately?โ
โHeโs Dazai,โ Chuuya said with a sigh. โWhich means yes, and also no, and also probably setting something on fire just to see how long it burns.โ
But his tone wasnโt bitterโmore resigned. Familiar. Like he knew Dazaiโs rhythms better than anyone and didnโt expect them to change, only to cycle.
โI think it shook him,โ you said quietly. โWhat happened. With me.โ
Chuuya was quiet for a beat.
โYeah,โ he said. โIt did.โ
You looked down into your tea. โHe hides it better than you.โ
โI donโt hide anything,โ Chuuya said. โI just swear a lot instead.โ
The front door clicked open a moment later.
Speak of the devil.
Dazai stepped in, coat slung over one arm, scarf missing. He looked slightly windblown, one hand holding a plastic bag that he dramatically wiggled in the air.
โI come bearing gifts,โ he said. โAnd by gifts, I mean sugar.โ
He set the bag on the table, revealing a lopsided assortment of mochi, cream puffs, and some neon-pink drink that probably shouldnโt be legally ingestible.
Chuuya made a face. โThatโs not food. Thatโs a health hazard.โ
โThatโs joy, Chuuya. You should try it sometime.โ
You smiled tiredly and reached for one of the mochi. โThanks.โ
Dazai sat on the arm of the couch, eyes flicking over you. โHowโs your pain today?โ
โManageable. Still sore. Still tired.โ
He nodded. โThatโs human, at least.โ
The three of you sat in the soft quiet that came after shared catastropheโno urgent mission, no blood in the air, no need to speak just to fill silence. You leaned sideways until your shoulder pressed against Chuuyaโs, and he shifted just enough to steady you.
Dazai, surprisingly, didnโt make a joke. Just rested his chin in his hand and watched the light play across the hardwood floor.
โI know I said it already,โ you murmured, โbutโฆ thanks. For not giving up on me.โ
โPlease,โ Dazai said, voice mild. โDo you know how hard it is to find people who donโt scream when I walk into a room?โ
Chuuya rolled his eyes. โHe means โyouโre welcome.โโ
You grinned.
Outside, a breeze rustled the balcony plants you hadnโt managed to kill yet.
Inside, you sat between two dangerous, complicated menโone a walking contradiction, the other a knife in a velvet gloveโand for the first time in weeks, the weight in your chest didnโt feel unbearable.
You were healing.
And you werenโt doing it alone.











