Saint October

Saint October takes place in a world where science can't explain a series of unexplained incidents occurring in the demon city. Three girl detectives, each with unique abilities, are brought together to solve these mysteries. Hayama Kotono, an orphan living in a convent, teams up with Shirafuji Natuski, her classmate and a pop idol, and Hijiri Misaki, a girl who fights her previous life's nightmares. The girls' investigation is further complicated by a boy who lost his memory that Kotono encounters.