Ten years into a cold marriage, Marina answers the door to a deliveryman who turns out to be Hosoda, the childhood friend who had a crush on her 20 years ago. He is now a handsome, muscular man with almost no trace of the boy she remembers. When he visits in the rain while her husband is away, she lets him use the shower and accidentally sees his cock. The tiny penis she remembers from bathing together as children has grown into something enormous. Overwhelmed by the sight, Marina loses control and gives in to repeated bareback sex with her newly virile childhood friend.