A young couple boards a crowded bus. The wife, frustrated with her sex life with her husband, is turned on by the bulge in the crotch of the salaryman standing 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. Her sexual desire overheats as the cock naturally becomes erect; stealing a glance from her husband, she grips the cock and guides it to her own wet pussy.