Hitomi, a married woman, lives with her son while her husband is away on a business trip. One day, Hitomi is caught masturbating by her son's friend who came to stay and study. He forces her to have a relationship with him. The young friends play with Hitomi's body, make her cum, and commit adultery with her while her son is not looking. And then... Hitomi's body becomes intoxicated with the pleasure she had forgotten for a long time...