The Moon of Seoul

Han Seok Kyu plays a charming gigolo from the slums determined to attain wealth at all cost in the big city. Choon Seop, an old friend from hometown played by Choi Min Shik, struggles hopelessly to stop Hong Shik from his self-ruin. The partnership of Han and Choi as uneasy allies or foes, parlayed into two flagship films of the 1990s: No. 3 and Shiri.
(Source: Wikipedia)