The Port Mafia and Armed Detective Agency were having a crisis and all their private information would get leaked to the world if they didn’t stop the person. So Chuuya and Dazai got pared together to take down the guy who was at this fancy party at a restaurant that was celebrating its anniversary. Dazai was the distraction, Chuuya was the interrogator. Everyone was distracted by Dazai and even Chuuya gets Distracted by Dazai..