Hiiro no Sasayaki

Saeko is a teenage girl who has grown up without parents, navigating the world entirely on her own. Seeking structure and a path forward in life, she enrolls in a highly strict boarding school where discipline is paramount and every aspect of daily existence is tightly controlled. Far from offering the stability she desperately needs, this rigid institution quickly becomes the backdrop for something far more sinister. Shortly after her arrival, the school is plunged into darkness when a terrifying series of murders begins to unfold within its walls. The isolated and heavily regulated environment transforms into a claustrophobic nightmare as students and staff alike realize that a serial killer is operating among them. Paranoia spreads rapidly through the hallways, leaving everyone questioning whom they can trust in a place designed to keep them confined. As the body count rises and fear grips the student population, Saeko finds herself drawn into the heart of the mystery. Desperate to uncover the truth behind the killings, she faces a chilling realization that threatens to shatter everything she knows. Who is the ruthless murderer stalking the grounds of the boarding school? As the evidence mounts and suspicion deepens, Saeko must confront an unthinkable possibility: could the killer be none other than herself?