Engaeyum Eppothum(2011)

Original title: எங்கேயும் எப்போதும்

Two buses collide, with tragic results. We see the past of four passengers: Amudha, a village girl visiting Chennai for the first time, falls in love with Gautham, a stranger, who shows her around the city. And then there's Kathiresan, a metal worker, who's infatuated by Manimegalai, a nurse.