I Was Groped In Public

Hi im nikol 19. Yesterday i returned home with a bus. That was very crowded. When my station reached i stepped forward. One step before i gott off the bus i felt a hand grabbing my @ss. I got off and turn around to argue but everyone behave like nothing had happen and no one looked suspect. The doors closed ans the bus left. Wtf ? Its the first time happens to me smthing likethis and im angry like hell !