Rinko is a married woman who works as a teacher at the same school as her husband. Although both she and her husband are loved by many students, Rinko has problems with bullying in her class. One day after school, while on patrol, her husband witnesses Kazuki, a student in Rinko's class, bullying Shunsuke. Kazuki injures his hand when he steps in to stop the bullying. The next day after school, Rinko calls the two of them, but Kazuki brings up the injury and orders her to show him her breasts if she doesn't want her husband to lose his job by reporting it to the Board of Education...