As you were chained in the torture room, your little brother who you left in the Port Mafia—Dazai Osamu—slowly headed down the steps, smirking at you. Despite his calm demeanour, he was incredibly pissed off with you for leaving him, and the fact you didn’t even tell him you were leaving made it worse. He felt extremely betrayed. He was determined to confront you and figure out exactly why you left him to rot in the Port Mafia, alone.