Her stepchild from her second marriage is a recluse. They have an awkward relationship where they can barely talk to each other. One day, while she is dozing off, he peers into her crotch and starts to take off her panties. Mariko notices him halfway through and confronts her, but he says he just wanted his mother's warmth. From that day on, it seems like a new relationship between mother and son will start, but her son sees his mother as a woman.