In this adult school-role-play fantasy, the serious and reserved Ria is repeatedly groped on the train but is too timid to speak up. She vows that today she will finally shout, only to encounter an assailant whose skill makes her lose control and climax so hard she urinates. The aching does not stop after she leaves the train. Though she hates being assaulted, she finds herself wanting more, boards the same carriage the next day, and accepts his hands until she drools and climaxes helplessly. Her prim appearance falls away as she finally asks him to take her somewhere she can moan freely and make her cum even harder.