Pallavan.

Pallavan, a happy go lucky college student cum ruffian falls in love with Meena during one of his bus journeys to college. But she is in love with Pallavan's younger brother, who does not have the guts to express his love. Pallavan does not realize that his dream lover is his brother's secret object of love! Another twist is that Meena is a minister's daughter and has a twin sister. What transpires later forms the crux of the story.