Tae Seok, Ji Yoon and Min Soo were best friends in high school. Tae Seok, son of divorced parents, is secretly in love with Ji Yoon when he knows Min Soo also has a feeling for Ji Yoon. But Ji Yoon does not have a feeling toward Min Soo. When Min Soo saw them kissing, he attempted to suicide infront of them. Seven years later, Tae Seok becomes a CF producer and he is sober than before. He has a new best friend named Dong Hwa. Accidentally, the woman Dong Hwa wants to marry is Ji Yoon, who was the first love of Tae Seok. Fate plays jokes with Tae Seok when he meets Ji Yoon as his best friend’s girlfriend. Dong Hwa finally dicovered the relationship between Ji Yoon and Tae Seok in the past from Min Soo’s sister, who is in love with Tae Seok. The reunion of Tae Seok and Ji Yoon makes Dong-hwa feel betrayed.