Red Paper Lanterns (1974)

A man meets a girl in the city. He falls in love with the chick. She claims she has fallen head over heels for him. She moves in with him. Returning home one day there is a man in their room. The man is lying down. He tells them he is an insurance salesman and he has stomachache. He has made himself at home. The three become room-mates. When the boyfriend returns home one day he finds his girlfriend sharing a bed with their room-mate. She claims she was scared due to a crematorium nearby. They move to another house.