Reiko, who got divorced three years ago, used to live with her beloved dog, Paula, like a family, but Paula suddenly disappeared. Unable to see Reiko who is overwhelmed by shock, she offers her daughter and her husband, Shinji, to live together. It was a Reiko who was fascinated by the goodwill of her daughter and her husband and was excited about the company. The defenseless appearance that young Shinji shows to Reiko stimulates Reiko, and he can't control his lust. And in front of such Reiko, Shinji who bares his body after taking a bath appears.