In the grimy, echoing corridors of the metro, a new recruit is initiated into the anonymous world of urban lust. Marked for anal, he's stripped bare and bent over, his tight, virgin hole glistening under the harsh fluorescent lights. The veteran fucks him hard, his thick cock slamming into the newbie's ass, pounding him against the cold, filthy wall. The sound of grunts and slapping flesh mingles with the distant hum of passing trains, as the initiate's cries of pain turn to moans of pleasure.