It was the season of dancing cherry blossoms when the spring break was about to end. I transferred to Konohana Academy. I was supposed to spend my remaining two years of high school life quietly at this school. But that modest hope was shattered. --Just before the opening ceremony, a teacher was murdered. A girl named Miako Tachibana forced me to cooperate in the investigation. I soon become entangled in the sinister black shadow that shrouds the school. Death threats are sent to those who have been captivated. The legend of the Grim Reaper that has been passed down in the school. Are the serial murders that occur one after another really the work of the Grim Reaper? The truth will be revealed at.......