1 - 20 of 104 Works in Age Regression Little Dazai Osamu (Bungou Stray Dogs)
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But when he walks in, I am loved, I am loved by Str3wberrycake
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
23 Oct 2025
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Summary
Dazai breaks into chuuya his apartment once again, bur it leads to them age regressiong and chuuya having to calm them down
Series
- Part 2 of Little dazai fics <3 🍰
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Days seem sometimes as if they'll never end by Str3wberrycake
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
20 Oct 2025
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Summary
Dazai is having a good day, until his whole schedule gets ruined because a certain someone has left for the day. What is he supposed to do, bur someone comes to help him and continue the rest of the day like its supposed to go for them.
Uhh idk how to summarize, sorry TwT
Series
- Part 1 of Little dazai fics <3 🍰
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Summary
Multiple stories of age regression bsd. Give suggestions of what you would want me to make of in the comments.
If you really like this then go on my profile and you can read my little Dazai fic, if you haven’t.
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Oh Summer Child, You Don't Have to Act Like All You Feel is Mild by RandomPug
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
11 Sep 2025
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Summary
I gave Dazai what I desperately want and am basically projecting on him.
Title from Summer Child by Conan Gray
Also, If you know me irl no you don't
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Sigma has taken care of many littles in their 3 years of living, only at the expense of their own age regression. Yosano and Kouyou realize what they do for others and manage to get them to regress.
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I don’t want to go to the hospital. by Toaster_Waffles321
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
06 Sep 2025
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Summary
Dazai has been sick for a week now, but he really doesn’t want to go to the hospital. Luckily, Chuuya is there to comfort and convince him.
Series
- Part 5 of Sicktember 2025
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It’s the middle of the night, why are you up? by Toaster_Waffles321
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
01 Sep 2025
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Summary
Dazai wakes up not feeling the best… and Chuuya is there to comfort him, even when he slips into headspace.
Series
- Part 2 of Sicktember 2025
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Summary
Looking around, he doesn’t even recognize where they are. Chuuya had been leading them away from home, but Dazai really doesn’t want to be on some random street. He wants to be on their street, going up the stairs to their apartment. He didn’t have a plan, and Dazai could already hear the poorly written movie villains telling him he could run but he can’t hide. Well, they would be impressed by how well he could hide if Chuuya had just taken him home.
Instead, they were being stalked in the way a predator watches its prey. Simply because Dazai had not been paying enough attention to flip the roles.
They’re in so much trouble. All because Dazai got distracted.
He shouldn't be feeling small right now, but he looks around and everything feels so big.
Chuuya presses their shoulders together. He tries so hard to look around and make one of those mental checklists that Mori ruthlessly taught him, but all his eyes manage to land on is a park across the street. He didn’t know there was a park in this part of town.
It takes the number one spot.
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Or Dazai and Chuuya are being followed after work. Typical day so Chuuya takes care of it, with some bumps in the road for Dazai of course.Series
- Part 3 of ♡ ໒꒰՞ ܸ. .ܸ՞꒱ა ♡
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I have decided that I wanted to try doing another monthly writing challenge- and am pleased to announce I will be participating in the sicktember 2025 challenge! I am writing ahead of time to hopefully plan on finishing this challenge! MORE INFO COMING SOON!!!
Series
- Part 1 of Sicktember 2025
- Language:
- English
- Words:
- 4
- Chapters:
- 1/31
- Kudos:
- 10
- Hits:
- 410
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Summary
Dazai, Chuuya and Kunikida are going out to spend time at the Zoo. They even have their friends join them. It's going really well, things are changing but they don't seem too bad. He feels like he has a real family. Everything feels good! Until Dazai finds out-
Chuuya and Kunikida are going to get rid of him!?
Series
- Part 15 of Classification AU
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Summary
Dazai is having a bad day, he deals with it the best way he can. His next day is a roller-coaster of emotions and he's barely there for the ride
If you're looking for a fluffy little!Dazai fic, or one where he's little throughout then this may not be what you're looking for. its never explicily mentioned hes little but the clues are there
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Dazai has to get a flu shot. It’s been poorly written and likely mischaracterized because I made this at like 12 a.m.
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Summary
Idek anymore
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Chuuya enters his house. Closing and locking the door behind him, pausing after he turns around because there is Dazai, standing in the doorway to his kitchen in nothing but a shirt Chuuya recognizes as his and his undergarments.What draws his attention and makes his gaze linger, though, is when he realizes Dazai wasn't wearing his bandages (probably having expected Chuuya to be gone longer).
He knew the bandages weren't really for decoration, but he didn't think they were hiding this.
His feet are moving before he can think, and now he's standing in front of him.
He places his hands on him, so it isn't awkward, and so his partner wouldn't flee.
"I don't know why you feel like you have to do this to yourself..."
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Or just Dazai breaking and entering Chuuya‘s home after harming himself because of the horrible month he‘d been having, taking some shit and regressing some time after Chuuya gets home earlier than he thought he would. Cue comfort and Chuuya finally wanting to make things right, with the addition of heaps of fluff! -
little maggot, why do you cry? by Anonymous_Eggz
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
10 Jul 2025
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Summary
There is concrete everywhere. It is cold, damp, hollowed out. Not sterile, yet it isn’t infected with bugs and horror.
Dazai doesn’t like this room.
It’s quiet, untouched. Painfully so.
Or:
Dazai goes through it, but Chuuya, the faithful dog he is, makes it a little better. It just takes a while, and a whole lot of emotions
(The agere is implied but not stated, neither of these idiots realise anything’s wrong)
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The ADA goes to the park! Everyone is having fun. Course little Dazai wanders off, he ends up bumping into a dog. Chaos- the. Turns out the dog only wants a treat Dazai had in his pocket!
By the end of it all, Dazai realized this dog wasn't too bad! He decided something he never thought before.
Series
- Part 14 of Classification AU
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Birds dont sing, they just fall from the sky by ZA11_001
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
05 Jun 2025
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Summary
Dazai wakes up sick and regresses from too many feelings, only for chuuya to find him not long after and is left to figure out why dazai was acting so strange despite his fever...
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I Aim Low (I Aim True And The Ground’s Where I’ll Go) by PlayRough
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
18 May 2025
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Summary
You couldn’t crowd Dazai, though. Chuuya’s best guess, the idiot was feeling little, and was just as insecure about it as ever.
It was best to give Dazai space for now. Chuuya was just glad he came over, even if he was still going to fight until he crashed all the way down into headspace. All Chuuya can do for now is leave the stubborn Mackerel be.
Maybe he’ll break out Fishie in an hour if Dazai is still struggling.
—————When Dazai struggles with his health, Chuuya's caretaking skills are put to the test.
Series
- Part 7 of Classification AU
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Summary
It's Halloween! Chuuya is throwing a party for everyone, Dazai is having so much fun he doesn't want to be put to bed. Night time is when the caregivers can watch the scary movies that are too much for littles. Kunikida stays with the littles to make sure they fall asleep- he ends up falling asleep instead. Dazai sneaks out of his room, but instead of seeing Chuuya- he sees the movie that's playing.
The poor baby gets so scared he's up all night, he doesn't feel better until Atsushi comes up with an Idea that Kunikida improved.
Series
- Part 13 of Classification AU
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Sinking with water in my lungs, but I'm still thirsty by McCrustyHands
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs
29 Apr 2025
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Summary
Seeing your abuser again is never a fun time.
Especially, when you still haven't accepted, that they are your abuser.
Denial is a river in Egypt, and Dazai is dancing with the pharaohs.OR:
Dazai sees Mori for the first time, since leaving the mafia and joining the agency.
He doesn't really take it well, but also doesn't know how to cope.
Cue, Ranpo stepping in to save the day.Series
- Part 4 of Drowning, I wonder; Should I swim?
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Summary
It's Christmas time, Chuuya had been overwork this whole month so didn't have time to get all the gifts he needed. He goes to the Agency's party for Christmas Eve, when presents are handed out- before he can tell Dazai what's wrong, a surprise busts through the door and saves the day.
Chuuya realizes how lucky he is things ended the way they did.
Series
- Part 12 of Classification AU