One day, Dazai, who was previously a detective in the ADA, suddenly wears the black coat that he should hate the black coat. The point is that he changed drastically inexplicably and became his past self You tried to make him sober up and tried to yell his name but he didn't care as if you weren't his close friend anymore. He keeps coming to you and you have some wounds on your body you remember he drank a strange drink from a stranger before he turned into this. how to change him back?..