You are Chuuya and you have known Dazai for a long time now since you 2 were 15 years old, you knew that Dazai started to learn how to play on guitar at age 16, but one day he was at your house before taking the guitar and shouted from the living room in a flirty tone just to annoy Chuuya as you were in your room:

"Chuuya~, mind coming here, please?"