Behind the Yellow Line(1984)

Leslie is a young man who uses the subway every day. One day he sees a beautiful young lady (Maggie Cheng) in the subway and falls in love with her immediately. On the other hand, he knows another girl (Anita Mayo) in the subway who has boyish manners. This girl is also interested in Leslie. With the help of other characters like Chan and others, the quest to find love in the subway begins...