Yui, a mom friend, stays over at the Kodama household. Since her husband is away on a business trip, she ends up spending the night. The next day, the two women are alone together around noon. After talking about touching each other's breasts and masturbating, one of them brings out a sex toy. They take turns using the toy on each other until both reach orgasm. Afterwards, they take a bath together, then move to the bed for lesbian play. They eat each other out, licking each other's pussy until climaxing. Their moans grow louder as they both feel intense pleasure—when suddenly, Yui's husband returns home from his trip. Confronted with the sight of his completely naked wife and her friend, what will he do?