Kozue, whose relationship with her husband has grown cold, begins working as a housekeeper to get through her monotonous daily life. She is assigned to the Hayashi household, a single-father home with a reclusive son, Yuta. Kozue finds joy in witnessing his heart gradually open up, and she warmly embraces him with overflowing maternal affection. Drawn to her nurturing presence, Yuta begins to develop deep feelings for her. Having had little contact with men for a long time, Kozue feels both nervous and awakened as a woman, and the bond between them steadily grows stronger.