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Summary
The Agency and the Port Mafia have made a deal which Mori intends to collect on, but of course not before letting the dread torment them for a month. A moth which Dazai spends spiraling as the majority of the ADA turns a cold shoulder to him after learning of his crimes and the imminent time he'll break his promise to Odasaku looms over him. And once he's finally settled in with his new (old?) family in the mafia who shall appear but a copycat organization bearing the dreadful name of Mimic, as if taunting him from beyond the grave about the broken promise. But is this merely a coincidence or is someone trying to lure him into a trap? (Genuine mystery since I haven't finished planing it yet so idk)
OR: Dazai rejoins the mafia & a Mimic copycat organization appears (In act 4 (like at ch 30 or something) so a good bit in)
Beware TWs in start of chapters!
OBS: WORK IN PROGRESS!
This fic may or may not be abandoned in the future & will have weekly updates past Ch 19 (until then daily)
YOU'VE BEEN WARNED! -
The wind is hitting your coat by tainedsorrowhuman
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
20 Oct 2026
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When ADA!Dazai unexpectedly arrived in the BEAST universe, the first thing he saw was Chuuya: bound by chains and entirely consumed by Corruption.
"What the hell...?" Dazai muttered.
He knew this wasn't normal. If it were, he would have been notified immediately—unless he had lost his memory and couldn't recall any of it. But that was impossible. He approached Chuuya, who was staring down, completely oblivious to another presence in the room—or perhaps he was so accustomed to it that he simply didn't care.
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At sixteen, Port Mafia prodigy Osamu Dazai calculated a flawless plan to isolate Chuuya Nakahara from his teenage street gang, the Sheep, forcing him to join the syndicate. But Dazai vastly underestimated the chaotic nature of human terror. A single miscalculation turns a strategic raid into a fatal massacre, leaving Chuuya digging through the burning, bloody ash of his childhood family.
Shattered by Dazai’s cold, heartless logic, Chuuya violently breaks their bond and turns his back on the underworld forever.Four years later, the coin has flipped. Chuuya is now a top investigator for the Armed Detective Agency, draping a tan coat over his shoulders and fighting to protect the city. But when a brutal new string of mafia executions leaves a chillingly familiar handwriting at the crime scenes, Chuuya is forced to face the ghost of his past.
Dazai didn't leave the dark. Instead, he became the Port Mafia's youngest, most ruthless Executive; The "Demon Prodigy."Or
What if Dazai stayed in the Port Mafia, and Chuuya left the Port Mafia to join the Armed Detective Agency? -
Why Now? by mothiomo, Moths_to_Flame (Contrast_of_Lights)
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
18 Oct 2026
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This was a supposedly a regular day, one of many days when Dazai goes to honor his dead friend at the graveyard. But surprisingly, he was not alone this time. The Port Mafia's Boss happened to be at the same place, at the same time, and soon… Things would turn real hectic.
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Chuuya clutched Dazai's suicide note in his hands, and held onto it long after Dazai was gone. Ever since that day, Chuuya has been writing letters to the ghost that still lingers by his side.
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They call Nakahara Chuuya the Sacred One, chosen by the gods, blessed with unimaginable power, destined to save the kingdom, and Chuuya never believed it.
Not when he's kept behind palace walls. Not when priests hide the truth about his birth, or when the scars covering his body begin changing with every use of his power, and definitely not when he starts hearing a voice beneath his skin.
Then Dazai Osamu, prince of the Fallen Kingdom and a stranger with a talent for secrets, arrives with orders to capture him.
One touch silences Chuuya's power, one touch changed everything.
As ancient gods awaken and the buried history of two kingdoms begin to surface, Chuuya must discover what he truly is before someone else decides for him. Because being chosen is not the same thing as belonging to someone.
And Chuuya Nakahara belongs to no one.
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(DomSub Verse take on Soukoku)
A few months after Chuuya Nakahara, a remarkable sub, joined the Port Mafia, a long series of suspicious attacks caused troubles to the organization. Mori couldn't leave the matter unresolved, so he requested Chuuya and Dazai Osamu to work together on this mission and discover the identity of their new enemies.
This proved to not be an easy task for them, who always found themselves arguing or getting on each other's nerves. Their opposite dynamics didn't make things any better, becoming the main issue of conflict between the two. Dazai had the reputation of being a feared dom, with an incredible glare and an insatiable thirst for control, while Chuuya was stubborn by nature and a rebel when it came to the game of dynamics. Chuuya was unlike any sub Dazai ever met and wished to have him obey, but Chuuya was determined to not let that happen, no matter the cost he would have to pay.
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Humans are considered to be the top of the food chain.
But there are beings who hunt them as food source.
These monster who feed on the flesh of humans...
Are called Ghouls.
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"Ghouls are monsters that should be killed..."
Everything was simple for Ghouls Investigator Nakahara Chuuya until he took the special surgery that made him more ghoul and less human.
Now, saddled with a mission to kill the monstrous ghoul monikered the "One-eyed fox" with no one but young Atsushi and a mysterious suicidal writer Dazai Osamu, he has a lot on his plate.
But when said ghoul starts to blur the lines between investigator and ghoul, Chuuya finds himself saddled with more than he can handle.
After all, it's impossible that Dazai is a ghoul... right?
Series
- Part 2 of Mafia Dazai and ADA Chuuya
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Atsushi didn't know what to think of the person he had met that day on the riverbank. The man was frighteningly strong despite his height. Had small alcohol tolerance despite his love for wine. Was bright and friendly despite his cursing. Was gentle and nice despite his dark past.
Most of all, Atsushi didn't know what to think about the massive darkness that followed Chuuya.
The shadow that came to Chuuya at night, whispering gentle and loving promises.
The shadow that came to Chuuya at mornings, carving a path of blood.
The shadow that gave Chuuya freedom, yet bound the man tighter and tighter in chains.
--Or--
A single twist of fate changed everything.
The last person Oda Sakunosuke talked to wasn't Dazai but Chuuya.
The person that left the Mafia wasn't Dazai but Chuuya.
The person that met Atsushi at the bank that day wasn't Dazai but Chuuya.
Chuuya embraced the light while Dazai shunned it.
Series
- Part 1 of Mafia Dazai and ADA Chuuya
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No. 16: Nowhere Else to Go | "You mean everything to me."
No. 19: "If this be victory, I pray I never win another."
No. 24: Post-Victory Collapse
A drug that permanently nullifies abilities is loose on the streets and Double Black act as bait while their groups attempt to get rid of the supply.Series
- Part 11 of SKK Whumptober 2026
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When a dock raid damages the internal seal holding the god Arahabaki, Ogai Mori decides to install a cybernetic chip in Chuuya’s brainstem to control his power—turning him into an emotionless weapon.
Chuuya reluctantly accepts his fate out of loyalty, but Dazai learns of the plan and takes a massive gamble. He ambushes the medical transport, rescues a paralyzed Chuuya, and hides him in a remote mountain cabin.
Over 72 sleepless hours, Dazai uses No Longer Human to constantly suppress the god, giving Chuuya’s body a chance to heal with No Longer Human. To survive, the former partners must brave an agonizing recovery, outsmart Mori's forces, and fight to reform the Port Mafia from the inside
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Chuuya could not deny it. He did want it.
Him.
Anyways, Chuuya was the prince of the kingdom, he could just take, couldn't he?
Even if the one he wanted was a common gardener and he was going to get married.
It wasn't like anyone would ever know...Or Prince!chu & servant!zai back in 1800's.
Series
- Part 1 of Corazón
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A journey and forever with you, always by D1sagreeable_Ev3nt
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
15 Oct 2026
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Chuuya drags himself up using his strength, dusts off any remaining debris and walks toward the mysterious man with an equally challenging smirk.
“I was wondering when you’d show up, shitty Kitsune.”
“The name is Dazai Osamu, pleased to finally introduce myself.”
Chuuya Nakahara is an exiled assassin with a limited time, he spends his days gathering money so he can die in relative peace, fortunately the price of killing people is high but the is consequences higher, so when a troublesome fox messes up his plans in order to solve a centuries-old conflict, he doesn't have a choice but to follow through.
or: Assassin!Chuuya and Kitsune!Dazai try and solve a mystery before the nation collapses
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Marrying Dazai Osamu was not easy business, and Chuuya knew this, mostly due to the ridiculous wealth the Dazai family owned. However, he could have never anticipated the fucked-up traditions his in-laws kept. Ever.
On the other hand, Chuuya had severely underestimated his new husband's devotion. Severing family bonds takes on a whole new meaning when it involves a shotgun.Nevertheless, Chuuya is going to have one hell of a story to tell—assuming they survive the night.
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Out of Focus (Out of Time) by str_yberries for Topaz on Tiktok!
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
18 Oct 2026
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"I want you to stop making me feel like I have to justify it."
Dazai had written those words for a fictional man. He'd never expected to hear them spoken aloud in a voice that made his chest ache. He turned back to his script. On the first page, beneath the title, there was a blank space where he'd intended to write a dedication.
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A multi-chapter series about Osamu Dazai, an indie filmmaker, who makes Chuuya Nakahara the star of every film he writes. Each screenplay is a love letter so intimate it feels wrong to watch, and every co-star Chuuya works with looks uncannily like Dazai.Because in every universe he creates, Dazai finds a way to love Chuuya.
(Attempted Daily Updates)
Series
- Part 4 of Val's Soukoku challenges
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He could almost remember them.
The 18,263 days repeating the same death, the same agony over and over again. They return to him slowly like falling leaves, as he spends his ticking time beside the one ensnared in his heart and memories.
By the time he recalls the last day, it is already too late. He is already gone, and this ceaseless cycle begins once again.
Through this cruel game, he has but one desire.
To take back a world where they could be together again.
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A continuation of Retrace
Series
- Part 2 of Tracing Through Violets and Echoes
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Dazai Osamu is dead, and his husband is the last person anyone trusts to explain what happened.
There is no body. There is a house full of evidence. There is Chuuya, still cooking for two.
The police think he killed Dazai.
Chuuya thinks they have the wrong idea.
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And In You, Was Me, Left Unseen by blasphemous_melancholy
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
10 Oct 2026
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Dazai Osamu is a walking contradiction and has no interest in fixing it. Atsushi can't help but watch and try.
A character study of Dazai through Atsushi's POV.
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bruises that won't heal by meeka_fish, stxberryhearts
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
14 Oct 2026
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Dazai suffers for 31 chapters straight in just about every way possible aka my contribution to whumptober 2026!!
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“Hmm?” not-Dazai (because Dazai would never do what this man has just done in front of them, he would never, he wouldn’t, he wouldn’t-) hums. Without a response, he continues blithely, “Well, what did you need?”
(standalone, part of a drabble series)
Series
- Part 9 of suicidal maniac