Sakamoto Masami is in his first year of high school and the ace of the basketball club. Because of his asocial behavior, his coach tells him to temporarily join the school's cheer leading club to increase his team spirit. Soon he finds out this isn't your average cheer leading club. All of sudden Masami is facing the choice to either put his male pride aside and dress up as a girl, or to never return to the basketbal club.

A beautiful transfer student, Hitode Rokishima, clad in a jet-black sailor suit, arrives in a classroom where one after another, the dead are "beheaded" by flying ski boards, steel doors in the subway, and crashing traffic lights. The only way to save the cursed high school students is to sacrifice one of them. Is the enigmatic girl friend or foe? Envy and fear, love and hatred are all mixed up in this horror story of school suspense.