On the crowded train, Reiji was unable to resist a vile man groping her all over. Paralyzed by shock and fear, she couldn't move or scream. She was forced to submit, eventually climaxing inside the train and letting loose a torrent of fluids. Days later, Reiji tried to return to her normal life, but the experience kept flashing back in her mind. What should have been a humiliating ordeal, instead, brought back only the pleasure that had been imprinted on her body. She couldn't help but crave the feeling again, longing to board that train once more. The lustful desire within her grew stronger, impossible to suppress.