Although it has been some time since she started living with her father-in-law, who is a photographer, the naive daughter-in-law Yuna has been unable to forgive him for his sexual harassment. One afternoon, after finishing her housework and having some free time, Yuna, frustrated with her indifferent husband Seiichi, ends up masturbating. Taking advantage of the fact that no one is looking, she exposes herself to him, but her father-in-law, who just so happens to have come home, captures the whole thing on camera. When Yuna finds out, she instantly imagines what is about to happen and is filled with fear...