Toko works as an executive at her husband's company, but his many affairs have left their marriage empty. When Saji, a sincere young adult graduate, joins the company, she secretly lusts after him and masturbates while thinking about him. Her opportunity arrives when she must take an overnight business trip in her husband's place. Claiming it will be valuable experience, she orders Saji to accompany her, gets him drinking at the hotel, and satisfies her starved pussy through what she calls a private lesson in sex.