Hundreds of years have passed since the rise and invasion of the "demon tribe," our natural enemy, oppressed mankind. The world was ruled by the "Great Demon King" and his 47 subordinate "Demon Kings. The people lived in fear, but they named 47 people selected from all over the world as "heroes" 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...
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