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Social Day: The Theme Park Adventures of The Armed Detective Agency and Port Mafia by queenmisanagi
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
18 Oct 2025
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When the Armed Detective Agency and the Port Mafia receive VIP passes to a newly renovated theme park, they never expect to pick the same day to go and run into each other…
But of course, they do.
Tensions flare, chaos erupts, and neither side is prepared for what lurks beneath the park’s glossy surface… because someone else is watching, and they have a much darker plan in mind…
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On everyone's 16th birthday, people can 'contact' their soulmate by drawing on their skin. Atsushi, raised in an abusive orphanage, depends heavily on his soulmate to cope daily. When Atsushi writes to his soulmate on his 16th birthday, he discovers his mate doesn’t want any involvement with him.
He kills all the staff and escapes the orphanage, heading to the nearest city to start anew. Unbeknownst to him, a dangerous group is waiting to steal his remarkable healing ability.
For the first time, he needs to rely on others for help—and he's willing to accept that.
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“I’m so happy you’re okay now.”
No, he was not okay.
“Akutagawa, ”
He felt weak and light-headed, and he could do nothing as he was gathered in Nakajima’s arms, unable to move a muscle and with too many unanswered questions whirling madly in his mind as he once again slipped back to unconsciousness.
“I’m not letting you go.”
In the darkness that surrounded the two youths, courtless crimson roses continued to blossom silently under the night sky, filling the cold air with their sickeningly sweet scent, everywhere and inescapable.
Or: a twisted reimagining of the vampire outbreak's aftermath.
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In Your Fire, I Was Warm by Rain_Beyond_The_Window42
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
12 Oct 2025
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Chuuya Nakahara was decidedly not having a great day. His evening was being ruined by a mackerel and a stupid mission that he could probably handle on his own.
But… he should probably look on the bright side. At least he was getting to go for a ride on his motorcycle. Even if it was to reach a safehouse, where he'd have to put up with a suicidal manipulative bastard for two nights. Eugh.
For now, Chuuya consoled himself by imagining various ways to exact revenge on his ex-partner. Besides, in three days, this weird organization would almost certainly be gone.
In three days, everything would be fine, and maybe Chuuya could finally relax.
OR: After the cannibalism arc, a new organization moves in the shadows of Yokohama. Their intentions are unknown, but they are almost certainly dangerous. The two halves of Soukoku are once again forced to team up, with the purpose of destroying the entirety of the threat. But one wrong move results in a catastrophic failure that could mean defeat for both the Agency and the Port Mafia.
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BSD : Kokoro no Yakata by melissahyuga930
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, slice of life"
11 Oct 2025
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Dazai was many things: assassin, mafia prodigy, the Demon of Yokohama, nightmare, executioner, living legend. But no word carried as much weight as "father," a role that eluded him. No one teaches a monster to love or protect, especially one raised to destroy.
The days of blood were behind him. He left the Port Mafia, stepping into the unknown, towards something different and warm. It all began with a promise to a ghost: "Save those you can." How does a man who only knows how to kill learn to protect?
The answer came with four children. One by one, destiny brought them to him. Dazai took them in, pieces of himself. Thus was born Kokoro no Yakata—the Mansion of the Heart—a home built on emotional ruins, sustained by a man who could barely stand himself. A refuge for the peculiar, the abandoned, those the world overlooked.
It wasn't perfect, with no constant laughter or guaranteed happy endings, but it was real. And that was more than anyone had ever had. Dazai was many things, and perhaps, he was learning to be human.
---English is not my native language so if there are mistakes I'm sorry.
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He hears the sounds of Corruption being activated.
He doesn’t think he has ever run faster than this before. He’s not used to feeling this anxiety. He hates it. It’s exactly why he plans for everything.
But right now nothing was going according to plan.
Chuuya trusted Dazai to be there.
Otherwise he wouldn’t have called him “Mackerel”. He trusts Dazai to make sure that isn’t the last thing he says to him.OR
Chuuya uses corruption defeat a villain and make sure the others survive
Dazai barely gets there in time. barely saves Chuuya. He lets his frustration and anger show a little. They fight. They make up -
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Nikolai's plan to kidnap a shark from an aquarium inspired this (mostly silly) BSD chatfic.
✨Updates irregularly✨
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Through the Barrier: Class 1-A in Yokohama by 0nly_islaa
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
28 Sep 2025
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Yokohama has been closed off from the rest of Japan for years—its citizens wield abilities far more powerful than Quirks, its factions rule with iron and mystery, and the world outside believes the city to be under villain control. Despite countless failed attempts by Pro Heroes to breach its barrier, a fragile deal is struck: U.A. High’s Class 1-A will be allowed into Yokohama for one month.
Under the guidance of the Armed Detective Agency—and with the Port Mafia watching their every move—Izuku Midoriya and his classmates must navigate a city where heroes are outsiders and the rules are absolute. Protected by Eraserhead and All Might, they must learn to coexist with the strange, terrifying abilities of Yokohama while uncovering truths the outside world has never dared to imagine.
And for Atsushi Nakajima, whose fate has been altered by the mysterious mentorship of Tatsuhiko Shibusawa, Class 1-A’s arrival may bring both hope and disaster. Because in Yokohama, survival is never guaranteed. -
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"What is going on, president?" Tanizaki inquired.
"I was just on the phone with Mori-sensei." Fukuzawa started, glancing at Atsushi, before closing his eyes. "He made up his mind on which member of the Agency is going to be transferred to the Port Mafia."
Atsushi tensed. A member of the Agency, transferred to the Port Mafia? Since when was that ever stated? Atsushi didn't even know about this until now, and he felt even more unnerved.
Tanizaki's lips slanted into a thin line, a crease forming between his brows. "...Who?" he questioned.
Fukuzawa's eyes fluttered open and zeroed in on Atsushi, as if staring into his soul.
"Atsushi."
He was transferred over to the Port Mafia?
He was going to be a member of the Port Mafia?
He had to commit crimes and go against his own morality?
Or-- Atsushi is the one who is transferred to the Port Mafia, challenging his morality and his purpose. At the same time, Akutagawa's lung disease was progressively getting worse and left him with only a few months left.
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After a chaotic mission, Atsushi guides Ryūnosuke through the intimate mechanics of sex, exploring closeness, trust, and care in a slow, tender, and intense post-mission night.
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It takes four years to become strangers.
It takes one mistake to destroy that.
|| In which ADA hosts a party, Dazai drinks, and everything goes to shit. ||
(might add more chapters, but it’s supposed to be a stand alone) -
Please Don't Make Any Sudden Moves (You Don't Know the Half of the Abuse) by LuluMarie
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
15 Sep 2025
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Eri is getting adopted within the week, and she wants the hero students who helped rescue her to be at the party they're having afterwards. The problem with that for the heroes is that the party will be in Yokohama. This means they have a choice to make: venture inside the so-called villainous city or gently let down the little girl who is so excited to have them come.
Who will go and who will stay? And for those who dare to enter the protected city, well...let's just say they will learn something new.
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Nightmares of Yesterday and Dreams of Tomorrow by AmberMomiji
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
14 Sep 2025
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Nakahara Chuuya wasn't born lucky, with no ability to two ability users and a medical condition to two perfectly healthy parents. His life could've been much worse, but it could've been much better too, especially if it wasn't made worse by his father's extreme means of fixing him. But maybe one day this nightmarish existence would come to an end and he could finally be the one to decide what he wants to do with his life. And perhaps salvation wasn't as unobtainable as it seemed, except it came in the form of a person with a shady character and a girl who enthusiastically proclaimed him her brother.
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Where the tiger roams, the shadow follows by Pasta_pancake
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
08 Sep 2025
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Here’s a half assed summary
In this AU, Yokohama is cut off from the world, feared as a lawless place ruled by villains. Rumors claim its “ability users” are mindless monsters consumed by their powers, stronger than quirks and compared to Nomu—especially after the Ame-no-Gozen incident. Most heroes avoid Yokohama, as those who enter rarely return.
After Ame-no-Gozen, the people ame-no-gozen stabbed mysteriously revive, Fyodor vanishes, and Atsushi remains deeply traumatized. Around this time, Nezu discovers a traitor at U.A. and needs a spy young enough to blend in. Distrusting local detectives, he contacts Yokohama’s government, arranging both a peace gesture and a chance to study abilities. The Armed Detective Agency sends 19-year-old Atsushi, who can pass as a student, while only Nezu and a few staff know his true mission. Secretly, the Port Mafia also sends Akutagawa to infiltrate the League of Villains
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[Omegaverse / ABO AU]
Peace between the Agency and the Port Mafia is a miracle. Chuuya being a Beta? Even better.
Or so he thought.
When strange symptoms start messing with his routine, only Dazai, his former partner, full-time nuisance, and annoyingly observant Alpha picks up on them.
Working side by side in this so-called “era of peace,” Chuuya has no choice but to face a reality he’s spent years avoiding and a bond he’s running out of excuses to deny. -
My Stray Villains by Mark_Beaks_Is_Best_Parrot
Fandoms: 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga), 文豪ストレイドッグス | Bungou Stray Dogs
25 Aug 2025
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Searching for an escape from heroes after the devastating loss at the forest training camp, the League of Villains seeks shelter in a weapons storage warehouse near Yokohama’s ports, only guarded by a few no-name basic-looking thugs that could easily be taken out with only a quarter of their power. Yokohama was infamous for its' large underground crime rings, and laughably incompetent heroes. It seemed like the best place for a villain group like the League of Villains to take shelter, regain their strength, and revise their plans.
Unfortunately, what the League of Villains didn’t realize was that they had just made themselves the perfect targets for Yokohama’s largest organized crime gang. And after an attack that leaves several lower-ranked members of the Port Mafia dead, Ōgai Mori is more than ready to take in new members.
(You do not need to know anything about BSD to read this fic, though i advise having at least vague knowledge of the Forest Training Camp Arc from MHA before reading, or at least vague knowledge of who the League of Villains is.)
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Dazai can’t resist. Chuuya can’t hide it. When a routine visit from the ADA collides with the Port Mafia’s halls, desire ignites in Chuuya’s office. Whispers turn to gasps, teasing to relentless pleasure, and every moan echoes through the corridor. Multiple rounds, oral, squirting, and aftercare follow, leaving Chuuya trembling, mortified, and utterly claimed—while Dazai stands outside, smug and satisfied, watching the chaos he’s wrought.
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A mission briefing turns into a game of sharp words, lingering touches, and escalating tension between Dazai and Chuuya. But by the time the mission’s over, the real danger isn’t the enemy—it’s what happens when they’re finally alone in the dark.
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THE SEA REMEMBERS by mariana_onette
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, EPIC - Jorge Rivera-Herrans (Albums)
12 Aug 2025
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"You..you aren't a human are you, dear kidnapper?" The question made everyone shut up. Chuuya gave him a glare, as if he could say that someone was a human or not.
"But of course! I'm glad you finally noticed. I'm not a mere human. I'm a God, Hermes, to your service." He giggled and bowed deeply. Dazai sigted at that sight. It was so stupid for him.
"Than, that means Dazai here, or Odysseus, is a part God, right?" Rampo continued. That made even Dazai stop as he he now lifted his gaze to him.
"You could say it like that. Yes, I'm not a human..at least by some parts" Dazai hummed. Everyone now blinked in sync as they glared between Rampo, Hermes, and Dazai.
Or: immortal Dazai as Odysseus trying to break his curse
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In Every Ending There is a New Beginning by AmberMomiji
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
06 Aug 2025
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Having been sent on an overseas mission alone, Chuuya didn't expect Dazai to suddenly disappear from Port Mafia, leaving him on his own. It wouldn't have been such a problem if Chuuya's ability hadn't began acting weird without Dazai's nullification there to calm it down. With that being a major problem, Chuuya had to do something about it before it became an even more serious issue. But soon enough a person named Fyodor Dostoyevsky showed up with an interesting proposal.