Asami comes from the countryside to stay temporarily and care for her pregnant daughter. Life becomes easier with his mother-in-law around, but the husband remains frustrated because his wife has forbidden him to masturbate until the baby is born. Seeing him listless, Asami treats him with gentle concern, yet her beautiful face and mature allure only make his pent-up desire worse. Then one night, she catches him masturbating because he can no longer hold back...