It had already been a year since her husband moved away for work and never returned. Yuta could sense that his mother, Natsumi, was struggling with loneliness despite managing to hold their household together on her own. He spent each day wondering how he could possibly comfort her. One day, Yuta accidentally witnessed Natsumi touching herself, releasing her emotions, and then crying afterward. Seeing her in such a heartbreaking state pained him deeply, and he made a new resolution—to take his father's place, supporting and comforting his mother in every way he could.