Kiyomi Nakazono is a 35-year-old housewife. Her husband, busy with work, has been transferred to a distant location, leaving her alone in their newly purchased home with only her son. One night, as she lies lonely in bed, her son suddenly appears. At first, she thinks he's just seeking comfort, but things quickly escalate beyond that. Surprised and conflicted by the unexpected turn of events, she finds herself awakening to new, forbidden desires.