After ten years of marriage, Ryo’s relationship with her husband has gone completely cold. One day she is approached by Hada, the childhood friend who had a crush on her twenty years ago. The boy she remembers has grown into a handsome, muscular man. When he visits in the rain while her husband is away, she lets him use the shower and accidentally sees his huge cock—a stunning transformation from what she remembers from their childhood baths. The sight shatters her self-control and draws her into repeated raw sex.