This AU takes place after the major conflicts in Bungo Stray Dogs, where tensions between the Armed Detective Agency and the Decay of the Angel have not fully settled. At the center of the story is a secret past relationship between Osamu Dazai and Fyodor Dostoevsky. What appeared to the outside world as pure rivalry was, in reality, a toxic and obsessive connection built on: • Psychological warfare • Surveillance and counter-surveillance • Emotional manipulation • Intellectual obsession