I'm Sorry, I Love You (2004)

Mu-Hyuk, a Korean adopted to Australia, is a tough but very attractive street guy. He is shot in the head at his girlfriend's wedding and must wait for his death. He decides to go back to Korea to find his parents. His mother is a famous old actress and her son Choi-Yoon is the most popular pop singer. Mu-Hyuk finds his twin sister Su-Kyung, who is mentally 6-7 years old and abandoned like him. He seeks revenge on his mother but he also falls in love with Eun-Chae, a very close friend of Choi-Yoon. And his struggling against death and revenge, love starts in a sad way.