The meta-fic focuses on the idea of human "scribes" observing their respective nations. Soon enough, it plays with the Literary Agent Hypothesis by having none other than Hidekaz Himamuya as Japan's scribe. And that the whole franchise itself is basically him discreetly leaking their existence to the public, though he deliberately tweaks some details. All the while, he cleverly "covers his tracks." After all, you though it was fiction, right?