Kyoushi No Junjou Seito No Yokubou

Math teacher Mamiya Nagisa is teased by his horny students at an all-boys high school on a daily basis. One day genius student, Sakura Minato, transfers from America. Minato jumps in to save Nagisa when he's being teased by the students, but then tells Nagisa, "I want to sleep with you." When Nagisa asks senior teacher Tsukioka for advice, Tsukioka attacks him! What will become of Nagisa's purity?