One day, Rika, who had started working part-time at a nearby cafe, was harassed by a persistent customer during her shift and nearly assaulted. She was saved by Nakano, another part-time worker, and gradually found herself drawn to him. Soon, Rika developed strong feelings for Nakano, and their relationship deepened. However, their bond took a twisted turn as she began to be treated like his sexual servant. Unaware that it was all part of a calculated trap, she sank into abnormal pleasures. One after another, she was targeted by the other part-timers and repeatedly creampie fucked, pushed into a situation she had never imagined. These days led her completely into an unknown world.