This work is a shocking portrayal of a secretary's promotion and the hidden reality in a major corporation. A beautiful female employee is selected as the president's secretary, filled with anticipation as she heads to the headquarters, only to encounter a series of dark rumors. While performing her secretarial duties, she discovers lewd photos of previous secretaries in the president's desk and witnesses a mysterious training room hidden behind the office. The scene where the president restrains and forcibly assaults her, who is in shock and fear, is breathtaking. The depiction of her being slowly penetrated and violated in the president's office during normal work hours, without being noticed, creates a mix of tension and immorality. Her performance of suppressing moans each time she is deeply touched, driven by her obsession with promotion, is remarkably realistic. The days of being tormented by the sticky piston making obscene sounds gradually transform the sense of immorality into pleasure, with excellent psychological insight. The transformation into a sex slave, with the president's training sex lingering in her mind unknowingly, encapsulates human weakness and desire. I watched this and was drawn into the corporate darkness and the depths of human psychology. Despite its length, the development keeps viewers engaged, making it a high-value piece as social eroticism.