Housewife Reiko one day finds herself suddenly subjected to groping while riding a bus. Her skirt is lifted and her buttocks are groped as she trembles in fear and humiliation. Yet in stark contrast to her mind, her body becomes enveloped in an intense pleasure unlike anything she has ever felt before. That awakened desire draws her back onto the bus, where the man once again touches and teases her body. Though frightened by the incident, she finds herself helplessly torn by uncontrollable emotions. Finally gathering the courage to report the incident to the bus company, she instead finds herself facing an even more humiliating situation. The on-site reenactment conducted there leaves her deeply shocked.