Yura, a pure and innocent girl, starts working at a massage parlor, where a client introduces her to secret extras. This experience awakens in her a thrilling pleasure in making men climax. Driven by this revelation, she obsessively hones her techniques to bring men to the edge, becoming more addicted to the act of making them cum than to money itself. As these secret sessions grow increasingly intense, she begins initiating sex on her own terms. Men ejaculate, squirt, and sometimes make Yura orgasm too—but her unshakable declaration, "I won't stop the secret service until I'm satisfied!" fuels the story with relentless passion. This film captures the unique charm of a beginner sex vixen: a naive, inexperienced beauty who, while being dominated, relentlessly chases her own pleasure.