2015. The last era when magic was still established. The Humane Continuity Guarantee Agency, Caldea, observes a world that can not be seen only with magic, a world that can not be measured only with science, and conducts research day and night to prevent the decisive extinction of humanity, with a preservation that preserves human history stronger than anything else Continued. One day, the future territory that had been continuing observations in Caldea disappeared, and calculations showed that ...