Titre original : The Hopeless on the Tower
Kobayashi somehow feels that maybe he can die if he stays with Hanasaki, so he joins the Boy Detectives' Club. His first mission is to help find a jobless young man who's gone missing. The club starts by receiving files on missing persons from Detective Nakamura and her subordinate, Miyanishi, who are facing an investigation of their own now after a medical examiner went missing. They were all set to begin the search, but when the mysterious and socially awkward Kobayashi perpetually clashes with Inoue and Noro, he tries to make a run for it.