When his best friend Daichi Shijima signs him up for Nicaea, a website that predicts violent deaths, Hibiki Kuze assumes it is a hoax, until a subway accident kills him exactly as foretold. Reviving with an app that summons demons, Hibiki becomes a Devil Summoner alongside Daichi and the enigmatic Yamato Hotsuin, among the few who can stop the invading Septentriones from wiping out Tokyo within seven days. This manga adapts the Devil Survivor 2: The Animation TV series.