Green Fallen Leaves (1976)

Hun meets Seon-A at his wife's funeral. She is a leukemia patient hoping to get in touch with her feelings about death. They end up at the same destination, where someone has followed them looking for evidence of Hun's wife's murder. Hun finds out the man thinks Seon-A is his lover. The two make a suicide pact but budding romance between them keeps it from happening. When Seon-A meets the man shadowing them, she wonders if Hun isn't using her. Did Hun's wife have a secret lover? Was Hun's wife killed? Is Seon-A being used?