O Kadhal Kanmani directed by Mani Ratnam is a love story which portrays the change over of two youngsters, (Adithya Varatharajan - Dulquer Salmaan, Tara Kalingarayar – Nithya Menon) who hate marriage and like only live in relationship, to soulmates. Movie is chiseled frame by frame n expression by expression. Great movie for the director after a long gap. Music by A.R. Rahman n lyrics by Vairamuthu are superb.