Taking advantage of a long holiday, a young man travels to his wife's parents' home. Waiting anxiously for his arrival is his mother-in-law, Hana Okazaki. As the days pass at the family home, the young man becomes captivated by Hana's alluring charm, his attention constantly drawn to her. Despite being married, his desire for his stepmother grows uncontrollable, and reaching his limit, he makes his way to her futon in the early hours of the morning.