Goodbye My Love

Min Su saved Gi Tae's life 13 years ago. In return, Gi Tae's wealthy father hired Min Su to keep Gi Tae out of trouble. Min Su is extremely loyal to Gi Tae, but Gi Tae is a spoiled playboy. Yeon Ju works in a cosmetic factory with Jung Ae. One night, Min Su and Gi Tae meet Yeon Ju and Jung Ae at a nightclub and they try to impress each other by telling lies, which they later regret. (Source: DramaWiki)