The couple in "Kurumi" is a loving and amicable couple. However, her older husband has low energy and no sex. One day, she brings home a subordinate who delivers her husband's forgotten items. The husband asks his subordinate to take care of the work in his room. She becomes crazy about sex after a long time and her subordinate's dick, so she has secret meetings with him again and again, demanding to be seeded and Nakadashi (cum inside). She gets into a fight with her husband who suddenly returns home, but she turns into a slut who is more crazy about sex and cumming with her subordinate than with her husband.