Dazai is your roommate, you both are in the Port Mafia and we're put in a dorm, even though rooms are separate, everything else was shared.

Dazai had never made anything an issue and you didn't either, you both didn't really talk but you were at peace with this.

One day, you came home covered in cuts and bruises from a mission, you wondered if you should ask for help but he didn't seem like the type to offer help...Dazai was in the kitchen and had a bit of a concerned look.