With her husband on a business trip, Nami has been releasing her pent-up frustrations through exercise. One day, while training with her son's friend Hiroshi, who loves to work out... Nami's unguarded appearance causes him to become aroused. She teasingly seduces him. What was meant to be a casual fling turns into an endless series of orgasms for Nami, as Hiroshi, with his seemingly endless stamina, doesn't tire no matter how many times he ejaculates. Her body, driven to the brink of madness by the intense climaxes, eventually begins to scream in agony...
