Uyarndha Manidhan
Raju, a rich man gets along even with the poor unlike his father. He falls in love with Parvathi, a poor girl but is forced to marry Vimala because of his father.
Starring Sivaji Ganesan, Sowcar Janaki, Vanisri, V. K. Ramasamy, Manorama, Sivakumar, S. A. Asokan
Watch "Uyarndha Manidhan" from streaming services Amazon Prime, Amazon released in 1968. It's a drama movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie.