I see you're looking for a specific song download link!
(Note: While some sources associate this era with Ilaiyaraaja, the music for this specific film was composed by
Official Streaming Sources:
Masstamilan Official Website: You can visit the official Masstamilan website to search for the song. Navigate to the search bar, type in "Kana Mayile Unnai Naan," and follow the prompts to download.