I'm Sorry, I Love You(2004)

Original title: 미안하다, 사랑한다

Cha Moo Hyuk is a man who was adopted by an Australian family but treated cruelly and then abandoned at a young age. By chance, he meets Song Eun Chae, a fashion coordinator dedicated to her employer, singer Choi Yune. Their meeting will have implications for the rest of Cha Moo Hyuk's life as a devastating turn of events leads him to delve into his past, and ultimately find happiness.