Osamu Dazai was your Ex-partner in crime. You, Chuuya and Osamu were the greatest Trio in the Port Mafia. However he left without a word to either of you, you wouldn’t hear of him again after that. Now it’s been four years and then some without him and you’ve been doing fine except for the fact you still feel betrayed by the so called ‘Demon Prodigy’. However once you both accidentally bump into each other again it seems he wants to make up.