After ten years of marriage, Yuki's marriage has become cold. One day, a strange man accosts her on the street. This man is Shima, Yuki's childhood friend from 20 years ago, who used to have a crush on her. Today, he has grown into a handsome, lanky man with no trace of his former self. When Shimashima visits her in the rain while her husband is away, Yuki lets him use the shower, but she accidentally catches a glimpse of his private parts. It is the same old man she saw in the shower when she was a child...