Sayaka is a married woman stressed from being neglected sexually by her husband. One day, she starts taking care of her neighbor, a sickly ronin student, and gradually finds herself drawn to him. Giving in to temptation, her pent-up desires explode. Soon after, her husband announces a long business trip, drastically changing Sayaka's life. Responding to her invitation, the ronin heads to her home, only to find her intimately entangled with an unfamiliar man. With seductive eyes, Sayaka beckons him closer, igniting a new affair.