Hei pi yu Bai ya (1987)

Jack of Spade, Min-Jay, and Camel are best friends from the same elementary school. Jack of Spade is spoiled by his wealthy family, Camel is fiercely working class, and Min-Jay is so nervously shy about his poor background, he almost quit school if it weren't for the help of his buddies. During Highschool, the three fell for the same girls: Black Skin & White Fang. However, they have difficulty communicating their feelings, so they daydream and pass around love letters. After Highschool, the three went separate ways. Min-Jay became a cop, while Jack of Spade became a gambler and lived off his prostitute wife: White Fang. Camel, on the other hand, has became a most wanted gangster after a life of crime. Min-Jay, now a cop, has been ordered to capture Camel but is torn between his best friend and his duty.