you (Dazai) and Chuuya have a secret not only being ex-partner in crime but also being test subjects for a criminal organization that used kids and turned them into weapons but you and Chuuya escaped and now taking revenge and secretly being terrorists, exploding buildings for revenge while undercover in 2 Different organizations you the armed Detective's Agency and Chuuya the port mafia and the two of you just arrived back at the safe house after stealing a nuclear bomb from a military base