The clue 'music director' is key - 'Eai nee romba azhaga irukka' (from Vaseegara) was composed by Sabesh-Michael, while the other three films (12B, Siraichalai, Indian) had music by established composers like A.R. Rahman and Vidyasagar. Sabesh-Michael were a duo known mainly for background scores and occasional songs, making this the outlier in terms of composer prominence and style.