Look Back in Anger (2000)

After the death of his father the eldest son Dong-Hoon joins a gang. His younger sister Mi-Na is often absent from school. The younger brother Dong-Jin becomes a detective. While eating at a restaurant Dong-Hoon meets a girl named Jung-Hee and they soon fall in love. However, Dong-Hoon later finds out that his girlfriend is the daughter of a rival crime boss.