Friend (movie, 2001)

The film follows the lives of four childhood friends: Joon-seok, the leader, whose father is a powerful mob boss; Dong-su, whose father is an undertaker; class clown Jung-ho; and Sang-taek, an exemplary student. The story is the director's experience about his friends, a semi-autobiography set in his hometown, Busan. When it was released it was the highest-grossing Korean movie of all time.