Yuki Takeuchi, a beautiful and flawless department head transferred from headquarters, was brought in to turn around an underperforming division. Her arrival quickly boosted morale and restored the department's performance. However, just as things were improving, Director Takeuchi suddenly went on maternity leave. This was suspicious—she had previously stated she had no interest in children and wanted to dedicate her life entirely to her career, especially since her relationship with her husband had long been strained. Sensing something was off, the protagonist consults their direct superior, Section Chief Yuuki, and decides to uncover the truth. Confronting Director Takeuchi directly at first, the investigation gradually exposes a dark, disturbing secret lurking within the department.