JUR-507 My childhood friend, who used to like me, had a small dick, but now he's grown into a sexually active man with a big dick, so I ended up having raw sex with him over and over again... Yuki Takeuchi

Ten years into her marriage, Yuki's married life has become cold. One day, she is approached by a man she doesn't recognize on the street. The man is Samejima, Yuki's childhood friend from 20 years ago who had a crush on her. He has grown into a handsome, strong man, with no trace of his former self. Then, while her husband is out, Samejima comes to visit her in the rain and Yuki lets him use the shower, accidentally catching a glimpse of his private parts. Yuki loses her mind at the sight of Samejima's large penis, which is a stark contrast to the small penis she saw when they bathed together as children...