Kei Terakawa, 45-year-old part-time office worker. Raising two children with her husband, she faces each day with a smile. However, in her married life, she gradually feels a sense of loneliness. After 20 years of marriage, intimate nights have become infrequent, and this emptiness sometimes tightens her chest. One day, seeing her son's figure after a bath awakens a deep, hidden desire within her. That emotion naturally surfaces in front of the camera, beautifully revealing feelings that had long lain dormant deep within her heart.