A man finds himself alone with a female student on the last train... He notices her panty flash and can't help but stare! But she catches him, and the atmosphere becomes awkward. The confused student, however, gets turned on by the late-night, enclosed space and asks, "Did you get excited looking at my panties, old man?" She lifts her skirt, teasingly showing off her panties. Things escalate further with handjob and blowjob temptations, leading to a night of intimacy on the train for these two strangers.