Seok Ho's a married man persistent demand for sex from his sex partner Ji Youn, but she always finds an excuse. Seok Ho's wife is, however, also having an affair with Suk Ho's colleague Young Soo. Ji Youn meets Young Soo on a blind date and is so disappointed that she goes clubbing that night to meet someone else. There she meets Young Soo's brother Sun Soo. The two become great sexpartners. They are unaware of their indirect interrelations until they are all invited to a concert.