On a night bus where passengers are asleep... Shinomiya Rui, after discovering a timid man, secretly seduces him in a guerrilla piston riding position. (FNS-204)

On a night bus where passengers are quietly asleep… A woman wearing a miniskirt that almost reveals her underwear, her deep cleavage faintly visible, begins to mutter to herself, “Huh? Nothing,” “I definitely brought it…” A kind-hearted man, M, sitting next to her asks with concern, but for some reason, the woman moves closer to him. She presses her soft breasts against the man, and when the driver isn’t looking, she grasps his penis and straddles him. With each vibration of the moving bus, she repeats the piston-like motion, moaning softly beneath the engine noise. She continues this riding position until she is satisfied, not stopping even when other passengers are puzzled. Late at night, if you encounter a woman with large breasts, please, please, do not strike up a conversation…