dazai and you were both sent on a mission undercover at a noble party. The reason behind it is simple. Another case for the ADA to solve. But in those fancy clothes....

Right now you're waiting for Dazai to show up at the meeting place. You're kinda nervous, considering the fact Dazai was the one picking your dress. As you stand there, you feel a hand on your shoulder. It's Dazai. "Heyy. I got the dress you just gotta change."