Main Cast: 

Kim Hee Sun               -----------------------------            Park Min Young

Song Seung Hun        -----------------------------            Choi Seung Hyun (TOP)

Kwon Sang Woo         -----------------------------            Kwon Ji Yong (G-Dragon)

Seung Hun and Sang Woo were best friends that grew up together. They had each other's backs in everything. But one thing tore them apart, their love for the same girl, Kim Hee Sun. Seung Hun decides to propose to Hee Sun one day, but her heart belongs to Sang Woo. They both would go to any length to protect her. With Hee Sun confessing her love and Seung Hun's jealousy, everything turns into a mess. Especially when Hee Sun turns out to be pregnant and Sang Woo is the father. Seung Hun decides to lie to both of them to keep them away from each other, but this messes it up more. Sang Woo leaves the country, while Hee Sun decides to run away with her unborn child. In time, Seung Hun marries, Kim Tae Hee, his fiancee, and Hee Sun gives birth to a healthy son. She names him Kim Ji Yong. 7 years passed and she is living happily with her son. But their story ends up being passed down to their children. 10 years passed and Ji Yong is in high school. He meets and falls in love with Park Min Young. Park Min Young eventually ends up falling for him too, but Seung Hyun, the son of Seung Hun intervanes as he also likes Min Young. The story starts all over with two guys fighting over one girl. How will these three end the story?

Kim Hee Sun as Kim Hee Sun

Kwon Sang Woo as Kwon Sang Woo

Song Seung Hun as Song Seung Hun

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Park Min Young as Park Min Young

Kwon Ji Yong as Kim/Kwon Ji Yong

Choi Seung Hyun as Song Seung Hyun