A student comes to the public pool with her nipples exposed through her swimsuit, and gets a hard on. She kneads her nipples and screws her in for an obscene creampie training session.

Rikka started attending swimming lessons at the public pool with her mother. She trusted the instructor because he always gave careful instruction, but... Rikka's still developing nipples were unconsciously visible through her competitive swimsuit, and the perverted instructor became aroused and began to develop her obscene nipples... Rikka's nipples were stimulated and stimulated through the smooth swimsuit fabric, increasing their sensitivity, and they soon became so sensitive that they ripened obscenely and went crazy. The swimsuit and training became more and more extreme, and eventually he even creampied her...