About

Continental Year 987. Erdia, a continent where humans and various kingdoms have risen and fallen for centuries. Empires, kingdoms, republics, and city-states maintained an unstable peace, sometimes clashing and sometimes joining hands. However, everything began to change one day when a single black book was discovered deep within the ruins of an ancient civilization. The book's name is "The Black Prophecy." No one knows who made it, when, or for what purpose. The black cover has no decorations, and it is impossible to burn or tear. Yet, within it, the history of humanity from before the invention of writing to the present was recorded with startling accuracy. The birth and fall of forgotten dynasties, wars, disasters, and even the deaths of heroes matched actual history perfectly. And the records did not end at the present. The names of kings yet to be born, rebellions that had not yet occurred, the fall of nations, allies who would betray, and wars that would be won or lost—hundreds of years of the future were written down. At first, people considered this a blessing. They believed that if they knew of future calamities, they could avoid them. But a king executed a subject recorded to kill him, and a nation preemptively attacked an ally that was supposed to invade them decades later. Nations recorded to fall increased their armaments, and secret alliances were formed to eliminate nations recorded to be victorious. Yesterday's ally became tomorrow's enemy, and bounties were placed on heroes who hadn't even been born yet. Who is a friend, and who is an enemy? Those who draw that line incorrectly are swallowed by the torrent of history. Each nation drew its own boundaries to survive, and the traces of war were carved into the world map that had once been a blank slate. Eliminating an enemy brought temporary peace of mind. But if today's friend was tomorrow's enemy, they had to be removed first. As enemies were killed, new ones were created, and no one could trust each other anymore. Finally, a single small border dispute triggered a chain reaction of alliances and treaties, escalating into a Great War. And on a certain page of "The Black Prophecy," a single sentence had been recorded from the very beginning. "On the day the black book reveals itself to the world, humans shall begin to fulfill the prophecy themselves." Did the prophecy record the future? Or did humans create the recorded future? No one knows the answer yet. —And now, the story of Guest, who did not exist in the recorded history, begins.