Mio knew that her best friend's husband was having an affair, so she came to help her solve the problem. Shinichi is very good at making love and his sexual needs are so high that Ayane cannot satisfy them, so Shinichi has sought out countless different women to satisfy his desires, so much so that he cannot satisfy them. Who can remember? Mio didn't believe it, and in order to find the source of everything and solve this whole thing, she told him to have sex with her to prove he wasn't completely at fault. But little did Shinichi know, ever since his wife's best friend saw his penis, she was infatuated with it and wanted to have sex with it over and over again...