In March 1995, Mikiya Kokutou meets a girl whose enigmatic gaze captivates him, and he falls in love. By the following April, he is reunited with her at his high‑school entrance ceremony; she is Shiki Ryougi. Meanwhile, the city is shaken by a series of bizarre murders that show no clear connections or motives. An astonishing secret awaits Mikiya, but he does not discover it until three years later.