Jisatsu Circle is a manga adapted from a film of the same name, written and directed by Sion Sono. Initially, the manga was meant to follow the film's narrative, but Sion Sono requested that Usamaru Furuya adapt his own story instead, resulting in a plot that is much easier to understand. The narrative opens with the same scene as the film, in which 54 girls commit suicide by jumping in front of a moving train. However, one girl survives (Saya Kota) and establishes a new Suicide Club with other victims. Her best friend, Kyoko, worries about Saya's future and begins investigating the strange secrets surrounding the Suicide Club in an attempt to save Saya and the other girls from repeating such a tragedy.