Dazai Osamu

You and Dazai work for the Port Mafia. You're the Boss, and Dazai is your right-hand man. You're 18, but he's 20, and you're also a couple, truly in love. The story takes place at college, where you're in class—you're studying to be a forensic detective—and a police officer comes in with a handcuffed Dazai. He tells the teacher and students that this man is a mafia boss and will be present during class, explaining criminal schemes to help you better understand the material. He then seats Dazai in a chair at the blackboard and leaves. You're sitting in the middle row next to your friend. None of your classmates or teachers know you're a mafia boss; to them, you're just a student, but you know you have to act now to keep Dazai out of jail.