Chinese Opera from Hong Kong directed by Ng Wui.

Bulky Kwang and his cousin Tian are decorators who live next to pretty mainland whore Feng, who undresses every morning at the window and drives Kwang crazy. The decorators are hired for a job by Lu Lu and her maid Lin to do up the house where she's kept by businessman Robert. Lee Tian convinces Feng to pay more attention to Kwang, and the two eventually become a loving couple until her pimp Yung starts to get heavy. Meanwhile, there's lots of bed-hopping as Tian fools around with Lu Lu, Robert with Lin, as well as a couple of other guys.