Kanna, married for 10 years, lives a cold and distant life with her husband. One day, a delivery man approaches her and speaks to her. The man is Odagiri, her childhood friend who had a crush on her 20 years ago. He's grown into a handsome and strong man, a far cry from his younger self. While her husband is out, Odagiri visits in the rain, and when she lets him use her shower, she accidentally witnesses his private parts. The private parts she saw when they bathed together as children...