Yumiko, the wife, is hospitalized, leaving her husband Toshio living alone with his father, Haruo. Feeling lonely and finding even instant meals tasteless, his mundane life takes a turn when Chizuru, Yumiko's mother, suddenly arrives. Chizuru tidies the messy house and warmly welcomes Toshio with home-cooked meals, her kindness touching his heart. He sincerely accepts her affection. From then on, Chizuru visits Toshio's home daily, watching over him with warmth. Her tenderness, overflowing maternal nature, and irresistibly voluptuous, alluring body become a new, intense stimulation for Toshio, who lost his mother at a young age, deeply stirring his emotions.