A female teacher who was disliked by her students because of her strictness. She arrogantly threatened students who had poor attitudes in class with repeating the year, earning them resentment. However, one day, the situation changed completely when a student witnessed her having sex with a colleague. In order to earn their forgiveness, she became a human toilet for her students, being gang-raped and having her throat violated. She begged for forgiveness with her face distorted with sobs and tears, but their punishment did not end. She continued to accept the students' meat sticks without knowing when it would end...