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English
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Published:
2026-05-16
Updated:
2026-05-25
Words:
1,103
Chapters:
2/?
Comments:
2
Kudos:
6
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My Unstable Bsd Au

Summary:

Basically just a shitty little au i made so yeah
most of them suffer.

PLEASE DONT TAKE ANYTHING FROM THIS AU AS IT IS STILL MY AU AND YEAH SOOOO UHMMM HEHE!

Notes:

I hate this so muchhhhh sorry abt all the bad writing and stuff im still working on it so it kinda sucks rn :/

Chapter 1: The beginning pt1

Chapter Text

A.N:YES THIS STARTS OUT NORMAL GUYS DONT FREAK OUT LMAOOOO
 
3rd person:
Sometimes when it's early in the morning you might just catch Atsushi staring out the window, almost as if he's waiting for something or someone.
And some other times if you look out the window as well you can barely just see what he was waiting for.
 
 
"-ushi? Atsushi hello are you there?" Dazai questions, he annoys Atsushi sometimes with all the silly questions but the company is comforting so he just grins and bears it.
 
"Huh- Oh sorry Dazai-san i must of spaced out!" The tiger boy finally answers, giggling as if he told a funny joke.
 
"Don't worry about it, hehe! Anyways, we have another mission to go on!!" Dazai states, almost missing the flash of emptiness in his mentee's eyes.
"I could always just go with Kunikida but I fear he would get mad over his ruined schedule!"
 
Atsushi's eyes scan his mentor as if searching for something, when finished with whatever that was, his face is quickly replaced by a warm smile.
"Don't worry Dazai-san I'm happy to go!" Nakajima chirps with a little bit too much enthusiasm, but whatever gets him out and about.
 
 
The pair walk down the dull paths of Yokohama, Atsushi looks for something again before turning to Dazai and finally asking.
 
"So whats this mission anyways, I thought we had nothing to do since the whole -------------- situation?" His head tilting slightly.
 
"There have been loads of reports about people going missing recently so we were asked to come take a look. I doubt its anything to serious, but if it is I'm sure we can handle it!" The brown haired man explained in a singsong tone.
 
"Hmm.. Do you think it has anything to do with the fact- ACK-" The younger man starts inquiring, but gets cut off as he spots a small silhouette and a piece of debris comes flying at him.
"W-what the hell was that?!"
 
The two quickly leave the area without looking back.
 
'around a month later'
 
Dazai's Diary:
September 24th *the year seems to be too smudged to read*
  
Dear Diary,
 
Recently Atsushi has been acting odd, as if something has changed.
Ranpo wont tell us anything, he just keeps saying.
"You'll know when the time comes"
Whatever the fuck that means.
I mean come on I'm just worried about my mentee and he wont even tell me anything?! God I feel so useless!
 
Aren't I meant to be smart? Did I fail you Odasaku..?
No i couldn't have. I think I might send him to get crepes with Kyouka tomorrow. Just so he can go get some fresh air.
 
Goodnight Diary, I hope I can sleep tonight.

 
Chuuya:
'I have a day off work today and I even decided to go to the park for some peace and quiet. But im still thinking about this new stupid mission I have to go on with Dazai and his new mentee, the were-tiger, atsushi? or whatever Akutagawa calls him.'
 
"What could possibly be making them go missing.." I whisper to myself, ignoring the giggles and footsteps rapidly approaching me.
 
"ACK!" Someone squeaks as they crash into my back, turning around, I get to lay my eyes on the most magnificent sight ever.
 
In front of me stands a boy, ever so slightly taller than me, with white hair and the most captivating eyes in the world, they glimmer in the sun the purple and yellow blending together as if the colours are trying to hug, his skin is pale, his smile so gentle i almost wanted to grab his face.
 
"Oh my god! I'm so sorry sir!" He squeals as he falls into a respectful bow. Then I notice he's blushing, probably out of embarrassment, but it's still possibly the cutest thing I have ever seen.
 
"Ah don't worry about it kid." I respond, chuckling a bit.
"And please don't bow it feels weird."
That wasn't entirely a lie it did feel weird, but only when it was him doing it.
 
Surely theres no way this could get any better righ-
 
"Is there any way I can make it up to you?" The cute boy asks, finally straightening up and smiling.
 
"Well.. Whats your name?" I respond genuinely curious.
I wonder if his name is just as cute as him-
 
"Oh! My names Atsushi Nakajima!" He chirps, the big cute smile never even faltering.
Wait. Isn't that the were-tiger's name?..?
 
"Were-tiger?" I freeze, I mean Dazai would find some way to kill me, even as much as i am a help to the detectives, if he ever finds out I thought- think that his student is cute.
My head is annoyingly loud and busy trying to process this, but if anything that sounds like a problem for the mackerel not me.
 
Atsushi instantly starts blushing again "Uhm yeah thats me!" His voice shaking a bit, it's clear he's nervous "U-uh who are you..?"
 
I start grinning, I know he will recognise the name, theres no way Dazai hasn't mentioned me at least once, even if was just to warn the boy.
"Nakahara Chuuya, pleased to meet you."
 
Watching the recognition slowly start to fall into his face is slightly amusing, but he doesn't look all that bothered by it, not that it changes anything but still.
'I really do overthink too much don't I?'