Hisae Yabe plays a married Milf mother who tells her timid son she will "teach him about a woman's body," then performs masturbation on the dining table. Mesmerized, the son begins massaging her body and involuntarily gets an erection, which she proceeds to suck. Even while he showers, she sneaks in and fondles his young body. The mother's excessive affection finally crosses the line, leading them into a deep incestuous relationship.