Ayaka has a dear friend named Hiroko. Hiroko suddenly vanishes from Ayaka?s life, saying that she must save someone important to her. Since that time, Ayaka hasn?t heard anything from Hiroko, until a girl?s corpse is washed up on shore, and she?s holding a letter from Hiroko which reads: ?Come save me.? Ayaka sets off to save her best friend, and ends up in a mysterious school where everything seems too good to be true. Is it?
