Lumina, a beautiful new employee who landed her dream job, struggles to endure the intense workload and harsh training as she pushes herself to the limit. However, overwhelmed by constant failures and excessive pressure from her boss, her mental state begins to deteriorate. After a certain incident, her superior's behavior grows even more cruel, subjecting her to relentless and extreme conditioning day and night. Gradually, Lumina loses control of both her mind and body, succumbing to pleasure against her will. Trapped in this brutal environment, she ultimately descends into becoming a sex slave.