Oru Cheru Punchiri (2000)
Oru Cheru Punchiri (English: A Slender Smile) is a 2000 Malayalam film written and directed by M.T. Vasudevan Nair. This is his sixth film as a director. The film stars Oduvil Unnikrishnan and Nirmala Sreenivasan in the lead roles. The film is based on Telugu writer Sriramana's short story Mithunam from the novel of the same title.
More at Wikipedia.