Joined for Soukoku Week 2017...proceeded to drown, and is happily still drowning, in the massive amounts of BSD on Tumblr. My life is now ruined, thank you Soukoku Week 2017. Come check my fics out at
https://archiveofourown.org/users/Ikiyou
Hc: Chuuya. 16 or 17. He always is either too jumpy/on his nerves end or can't control how hard he punches or smthng. Mori gets tired of having to allow absences due to injuries chuuyas accidentally given coworkers. Hirotsu gives him a drum. Chuuya has fun with it until he accidentally breaks it a week in. Next day, he finds a new one in his office (kouyou claims it was NOT HER). Chuuya becomes pretty good at drumming and reads a bunch of books and stuff to learn more.
ANYWAY drummer chuuya in canon universe is what I am suggesting
And yes, Dazai sneaks up behind him to slap the drum hard to scare chuuya. Chuuya, in turn, starts waking dazai up every morning by going to his window and playing loudly. Dazai retaliates by loudly playing a kazoo or harmonica at his door in the middle of the night.
The first time chuuya breaks his drum in years, everyone is surprised, and it looks as though chuuya punched through it. Chuuya explains its because dazai's hard headed. Insert looney tunes style breaking drum over head flashback