Sae, a married female teacher in charge of health and physical education at an all-boys school, took sex education seriously, but the teenage male students mocked her lessons. Frustrated by the arrogant attitudes of ringleaders Maeda and Yoshinaga, she made them stand in the hallway as punishment. In retaliation, they dumped a bucket of water on her, making her clothes transparent and leering at her exposed body. As a result, the two were suspended and grew resentful toward Sae. Seeking revenge, they forcibly dressed her in sheer clothing and forced her to stand on the classroom podium, humiliating her in front of everyone.