A deserted island, a towering mansion, a ninth person who is supposed to be missing... Shijima Island is said to have once been the site of research into the ``door to another dimension.'' Aspiring "great detectives" take on the serial murders that occur on the "urban legend island"!! Daichi Tenmei, a high school student whose father is a great detective, and a classmate with overwhelming insight and deductive powers. ・Jin Shiba. When the super high school students solve the mystery of the incident, the two learn the meaning of "truth". “Hundred Note” first comic adaptation!!