Unpai has been selected as the advisor for the swimming club. She is a popular teacher who is beautiful, has an incredible figure, and is very caring. One day, one of her students, Nishino, confesses his love to her. Unpai thought she had politely rejected him, but this triggered a huge outburst from the students, who resent her! 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 horny students, cumming against her will! An endless creampie relay where she is defiled and gang-raped by the overly productive semen!