Touko works as a managing director at her husband's company. Her husband has had several mistresses and their marriage seems like a stranger to her now. At that time, a handsome young man named Saji joins the company as a new graduate. Saji has serious and innocent eyes, and Touko secretly lusts after him and indulges in masturbation, but one day her chance arrives. Saji is going on an overnight business trip in place of her husband. Seizing the opportunity, Touko orders Saji to accompany her, saying it will be a good experience. When they arrive at the inn, she gets him drunk under the pretext of a party, and fills his hungry pussy with sex in the name of education.