Hearing that her daughter had had a fight with her husband, Kozue (Kozue Tokita) volunteered to mediate. With Kozue's intervention, the couple's discussion went smoothly and the matter was resolved without incident, but... That night, Kozue was staying at her daughter's house and was accidentally seen by her son-in-law while taking a bath. Her son-in-law looked at her passionately, clearly lustful. Sensing his gaze, Kozue became slightly excited. Contrary to her feelings as a mother who wished for her daughter's happiness, Kozue felt a tingling sensation deep inside her body.