This anime is an adaptation of the Sega RPG game. Mysterious disappearances are occurring one after the other in Tatsumi Town. The series itself revolves around a group of students entering a fantasy alternate world. In the fantasy world monsters that hunts down the living exsist. Kiriya has a vision from a mysterious beautiful girl with pointy ears. A book talking for an alternative world is found. And Mao searching for her long lost friend, Zero, comes to our world. Mao accidentally take Souma and Kureha to her world. Now, Souma and Kureha have to find a way to come back. But other forces are playing their part in the darkness and Souma with Kureha will find that going back is harder than they first anticipated.