Unpai has been selected as the swimming club's advisor. She's beautiful, has an incredible figure, and is a popular teacher who is very caring. One day, one of her students, Nishino, confesses his love for her. Unpai thought she had politely rejected him, but this incident sparked a resentment among the students, leading to a complete outrage! She is forced to wear an extremely provocative competitive swimsuit that exposes her breasts, and one after another, she is violated by the lustful dicks of the students, climaxing against her will...