Narumi Jinguji heads the gynecology department at St. Juliana Hospital, distinguished by her long green hair, glasses, and an enigmatic presence accentuated by her voluptuous demeanor. Her past intertwines with Ryuji Hirasaka, a former colleague and medical school rival who raped her—an act that irrevocably shaped their fraught dynamic. During their academic years, the two engaged in a fierce rivalry, culminating in a high-stakes wager where Narumi challenged Hirasaka to seduce specific women within two weeks before graduation in exchange for her submission, exposing her early fascination with manipulation and power.

Years later, she recruits Hirasaka to lead a clandestine hospital division designed to gratify patients’ sexual urges, covertly establishing a prostitution ring under the guise of medical care. Her motives blur revenge, psychological fragmentation, and a warped ambition to dominate institutional systems. Her psyche oscillates between calculated control and explosive volatility, rooted in unhealed trauma. This instability peaks in a suicide attempt following a failed plot to assassinate Hirasaka in one narrative thread, though alternate timelines reveal her surviving to observe his wedding—a testament to divergent story arcs.

Expanded media explores her pivotal role in Hirasaka’s moral decay, framing her as both instigator and casualty of their shared history. She operates with strategic manipulation, wielding her authority to engineer institutional corruption while concealing vulnerabilities behind a composed facade. Her actions consistently reflect a duality of agency and victimhood, anchoring her as a complex force within intersecting narratives of control and retribution.