Ririka Kinoshita, a married female teacher at the same school as her husband, is beloved by students and colleagues alike. However, she struggles with a bullying incident in her homeroom class. One day, her husband witnesses student Kazuki bullying Shunsuke during a patrol and intervenes, causing Kazuki to injure his hand in the process. The next afternoon, Ririka calls both students in for a talk, only for Kazuki to bring up the injury. Fearing her husband could lose his job if the incident reaches the education board, Ririka demands he expose his chest as punishment. This shocking turn of events intensifies the tension in their marriage and exposes deeper conflicts within the school's moral and educational framework.