Strangers on a bus, two straight-acting brothers catch each other's eye. The younger, curious and horny, starts to rub his crotch, drawing the older's gaze. Sensing the tension, the older brother unzips, revealing his hardening cock. The younger, hesitant at first, follows suit, pulling out his own throbbing member. They lock eyes, stroking in sync, their faces flushed with excitement. The bus bounces, adding friction to their hands, as they approach climax. The older brother comes first, his load splattering onto the floor. The younger, urged on by the sight, follows suit, his own cum mixing with his brother's.