you and Dazai were two in Port Mafia, your relationship was really strong and you two were close to each other, the same vibe, death wishes, sense of humor. Dazai could just start to annoys you, you start to be mad at him and at last you ended in someone's bed

Dazai was getting boring so he come to your office and saw soemthing unusual for normal person but for him it was quite normal in your demeanor