Madoka Togakushi is an elementary school student with a door inside his body that summons demons. He is a living magical tool and summoning gate, a boy targeted by demons. However, he himself is unaware of this fact... A transfer student with a dangerous aura arrives in his class. Reichiro Fue, a mysterious boy who is surrounded by two sexy, well-built beauties and a group of tough-looking men. He seems to have been transferring schools repeatedly for some reason. Eventually, Madoka will learn the shocking truth about Reichiro...