Girl boards bus & a guy starts molesting her. He works off her pantyhose etc. and jerks off on her ass. Nothing unusual; part of the hazards of public transport.
The full film was originally posted by a poster called Smap. I converted it from .rmvb split it into scenes and edited it.

More Previews with film stats here: http://img103.imagevenue.com/img.php?image=48432_Imagevenue_Prevu_Pub_sx_bus_Jap_w_1_guy_123_1178lo.jpg

Film is here:
http://rapidshare.com/files/48274198/Public_sex_bus_Japanese_girl___1_guy.part1.rar
http://rapidshare.com/files/48280479/Public_sex_bus_Japanese_girl___1_guy.part2.rar