Tatsuro moves to the city to find work and temporarily stays at his son Yota's house. He is greeted by Natsumi, his daughter-in-law, dressed in almost nothing. Surprised and unsettled by her unusual lifestyle and carefree attitude, Tatsuro gradually finds himself drawn to her warm, gentle nature and sensual charm. The sound of Natsumi's voice echoing late into the night awakens the dormant masculine instincts deep within Tatsuro, sparking new and forbidden desires.