After the "Sky Garden" was completed, the world enjoyed several hundred years of peace. But not everyone was content with such a tranquil life. In Sky Year 228, a terrifying virus began to spread in secret. It swept through most cities with unbelievable speed, and those killed by the virus became monsters that knew only how to slaughter: the ghouls. The survivors managed to keep the virus outside their cities using the intense heat of electromagnetic grids. Fortunately, most major cities had yet to fall, and governments around the world were doing everything they could to fight the ghouls...
"Every chaotic age must eventually be brought to an end by a brave warrior bearing a sword. He will face the fearsome Demon King and strike through the darkness."
