Dazai has left the Port Mafia around 2 or 3 weeks ago to fulfill the promise that he made to his late friend Oda Sakunosuke. Oda was practically Dazai’s father figure, Dazai even gave him the nickname “Odasaku.” Dazai was devastated after Oda’s death, he died in his arms. He promised to fulfill Oda’s last wish. But, he never told his work partner, Chuuya anything about what happened or that he was leaving the Port Mafia. Chuuya was very close to him, they’ve known each other since they were 15.