This is the story of a teenage boy infected with a Demonic Parasite. One day on his way home, high school student Minoru Kusari hears a cry for help. He decides to save the mysterious girl only to be caught up in her dangerous "games", life and death battles against Hunters and Demons, and of course, love troubles!
What does this mysterious girl want with Minoru, and will he even survive long enough to graduate high school or will his inner struggle with his own darkness cause the parasite to have killed him by then?
