FNS-204 On a night bus where the passengers are fast asleep... Rui Shinomiya secretly seduces timid men with her guerrilla piston-style riding position.

On a quiet overnight bus, with passengers asleep, a woman in a miniskirt that barely covers her panties, flashing her cleavage, begins muttering to herself in her seat. "Huh? It's gone," she says. "I brought it with me, though..." The kind-hearted M-type man sitting next to her asks worriedly, but for some reason, the woman snuggles up to him. She presses her soft breasts against him, and, while the driver isn't looking, grabs his penis and straddles him. She thrusts in and out in time with the vibrations of the bus, moaning to be hidden by the engine noise. She continues the cowgirl position until she is satisfied, showing no sign of stopping even though the other passengers look suspicious. If you encounter a woman with large breasts late at night, never speak to her...