Pretty painful and dark manga about two high school students, the Kamiyama Izuki and Morino Yoror, who are of particular interest in deaths and especially the murders accounted for next to them. Because of their strong hobby, the murder and highly developed analytical skills (along with some luck) they manage to reveal the murders who even slipped out of the authorities. However, acting from his own sense of justice and in their own interests, the killers often can escape with the killings they committed. Often, it is the fireyama that decides even in the thinnest details, but it is only interested in one thing, and this is a method with which Jorus Morino must be killed.