Yuna Shiina, a beautiful teacher at a famous private school in Tokyo, is rumored to be the most beautiful in Tokyo and has outstanding teaching skills, making her a Madonna-like figure, sought out by not only the male students but also the male teachers at the school. However, one day during an after-school supplementary class, an incident occurred. A male student, who was said to be the most intelligent in the school, asked for her body, and Yuna, tempted by the devil, made a one-time mistake. A male teacher who happened to witness the scene reported Yuna to the vice principal, and...