(Japanese: トリニティセブン 7人の魔書使い, Hepburn: Toriniti Sebun: Shichi-nin no Masho Tsukai) Arata Kasuga lived a normal life together with his cousin and childhood friend Hijiri Kasuga in a small town. However, everything changes on the day of the Black Sun, which caused the Breakdown Phenomenon which destroys the town where he lived and takes Hijiri away.
