Wanting to change her life of wasting time, housewife Shuri starts going to a personal gym. Trainer Uchimura tells Shuri that she can improve her figure, and though embarrassed, she follows his instructions. Kokoro by her trainer's muscular body, Shuri is approached and assaulted by Uchimura. Shuri, who had been sexless, is penetrated shallowly nine times and deeply once, her body trembling as she reaches a spasmodic orgasm. She faints in agony at the technique that her husband does not have.