Mayumi, a dedicated female teacher at a prestigious high school, works tirelessly to help her students pass their university entrance exams. She is earnest and hardworking. On weekends, she is often asked by her students to provide extra tutoring... However, the students are frustrated by the intense competition of the exams. They harbor resentful feelings towards Mayumi, who, despite making them study hard, has a steady boyfriend. These twisted emotions lead them to assault Mayumi and take over her home...
