The focus of the manga is on a series of suicides by hanging that have been affecting Kongou for the last two years. There's a popular myth that a girl contacts the victims to sign a contract to kill themselves, and follows them until they go through with it. Saotome, a Kongou college student studying folklore, has been frequently dreaming of himself hanged by a rope in a graveyard for some time. He starts consulting a therapist, Koyomi Hirasaka, who specializes in suicidal tendencies. However, Saotome unwittingly agrees to the suicide pact with Koyomi, who then starts stalking him.
