High schooler Shiina Shinya believes that all girls are essentially good-for-nothing, largely because he fails to understand them. This misconception does not prevent him from being surrounded by eccentric girls. Tsubasa Tooka, a cute and widely admired girl, stalks him. Shikimura Masami is heavily into masochism and has recruited Shinya for her play sessions. Ikari Satsuki appears suspiciously interested in recent serial stabbings and seems intent on dragging Shinya into the matter. Banjou Yoruko, a typically quiet and bookish girl, has decided that she and Shinya are bound together in some fantasy setting. Uchida Yumeji is the school's sleeping beauty, who spends all her time in the infirmary due to her need for extensive sleep. Shinya brings her newspapers so she can keep up with current events during the brief periods she is awake. Lastly, Okui Akane is convinced she is a vampire. As far as Shinya knows, it could be true, but in practice, it simply means he must let her drink his blood. How will Shinya handle all these good-for-nothing girls who complicate his life?