Rino, a busty married woman, moves next door to an apartment where a voyeuristic man lives. The man immediately starts taking pictures of her bouncing breasts and firm ass while she's jogging. Seeing Rino running, emphasizing her bouncing breasts, the man can't contain his excitement. Eventually, he's not satisfied with just taking pictures, so he asks Rino, who has come home, to help him carry his luggage, invites her to his house, and rapes her. The man who has imprisoned Rino calls his part-time job friends and further trains Rino's big breasts.