[Machine Translation] Humanity's last hope for survival is a last-ditch strategy.... Hundreds of years have passed since the rise and invasion of the "Demon Tribe," the natural enemy of mankind. The world has been ruled by the "Great Demon King" and his 47 subordinate "Demon Kings". The people lived in fear, but they named 47 "heroes" selected from all over the world and prepared to fight against the Demon King's army. And now, a desperate campaign for the survival of the human race is about to begin...