Naejoui Yeowang(2009)

JI and Bongsun were two high school girls who didn't get along. JI was very popular and Bongsun was very pushy. Years later, their lives are reversed and Bong-soon's husband becomes very rich and famous, and JI's husband is a simple employee. Dalsu is having an affair with his boss's wife and JI doesn't know what to do...