Marina is a teacher who works at the same prestigious school as her husband. Although the couple has a good relationship, Marina is worried about her husband, who is only concerned with grades and does not get along with some of the students. Her worries come true a few days later, when her husband happens to be present when a delinquent student, Kanzaki, is bullying an honor student, Okamoto, and ends up pushing Kanzaki away. After hearing the story from her husband, Marina calls Kanzaki out of class the next day to apologize in person. However, Kanzaki, still angry, orders Marina to take off her clothes in front of him. Reluctantly, she shows him her naked body, but Kanzaki's desire knows no bounds, and he orders her to atone for her husband's sins with her body...