A high school teacher and swimming club advisor, Aoki, receives a fierce attack from his former student Yukishi, who had to quit due to an injury. They gradually become physically involved. Aoki has a fiancée named Kagawa, but he can't end the relationship with Yukishi. Every time Yukishi ejaculates inside her, she is overwhelmed by unknown pleasure, and her well-trained beautiful body slowly drifts away from her fiancé…
