Mayu, 24, a refined young lady who graduated from a music university in Tokyo. Known as a pure and innocent beauty untouched by the world's corruption, she was scouted during her job hunt by an IT consulting firm and hired as the CEO's secretary. The CEO already had a wife and children, and Mayu believed she would never fall for him. However, shortly after joining the company, she became involved with him intimately. The CEO used to unwind from stress every weekend, spending Friday and Saturday nights at the same bar. Before long, Mayu was forced to accompany him, ordered to strip, restrained, and made to accept the cocks of complete strangers, beginning a life devoted solely to relentless pleasure.