A young couple boards a crowded bus. The wife, chronically sexually frustrated with her husband, is tormented by the bulge in the salaryman's crotch next to her. Unable to resist, she begins to press and erotically grind her ass against another man's cock, careful not to let her husband notice. As the cock naturally erects, the wife's lust overheats; stealing a glance from her husband, she grips the cock tightly and guides it into her own wet pussy.