My Brother is a 2004 South Korean buddy drama film written and directed by Ahn Gwon-tae.
Kim Jong-hyeon, a tough high school student who excels at fighting, has trouble getting along with his older brother Seong-hyeon, a studious type with a cleft palate.
They were born within a year of each other, and attend the same classes at the same school, though Jong-hyeon largely ignores Seong-hyeon.
Jong-hyeon also harbors some resentment towards his single mother, who seems to prefer the elder son.
The film was released in South Korea on 8 October 2004 and topped the box office for two weeks.