Nao, a former top ballet dancer, was forced to retire from the stage due to injury. However, she refused to give up on her dreams and vowed to recover through relentless daily training. One day, she received an audition invitation from a renowned overseas ballet company—an opportunity offering a new form of artistic expression she had never experienced before. Yet the theme of the performance proved extremely challenging for her: it centered on anal sex as a groundbreaking form of art.