On a crowded train, she felt something off about the hands that were exploring her body. It was too late by then; she never expected to be the target at her age... Surprised and terrified, Yukiyo froze up when they started violating her. She couldn't even utter a word like "help," feeling humiliated beyond belief. Ever since then, she has been haunted by the memories of fear and shame but can't forget the pleasure she experienced during that ordeal. Could it be that she secretly desires such degradation? To find out, Yukiyo decides to board the same train once again, seeking redemption or perhaps more of the same perverse thrill.