Maths teacher Mamiya Nagisa is teased by his horny students at an All-Boys school on a daily base. One day, genius high school student Sakura Minato transfers from America. Minato jumps in to safe Nagisa who’s teased by the students, but is told by him: “I’ve come to sleep with you.” When he asks senior teacher Tsukioka for advice, he is attacked by him. What will become of Nagisa’s purity….!!