Mio knows that your best friend's husband is having an affair, so she came to help you resolve it. Shinichi is very good at sex and his sexual needs are very high, so Ayane cannot meet them. Therefore, Shinichi has sought out countless other women to satisfy his desires, so much so that he cannot remember them all. Mio doesn't believe it, and to find out the truth and resolve the whole situation, she told him to have sex with her to prove that he is not entirely at fault. But little does Shinichi know, his wife's best friend has been infatuated with him since she saw his manhood and wants to have sex with it over and over again...