"Why doesn't anyone remember the real world...!" It was an era when the war between the five races for supremacy on earth ended with the victory of humans led by the hero Sid; but this world was suddenly "rewritten" in front of the young boy Kai. In the rewritten world, what Kai saw was the scene of humanity's defeat in the war between the five races because the hero Sid did not exist-here, dragons and demons ruled the ground, and Kai became a forgotten existence by everyone. But after Kai met the mysterious girl Lingna, he decided to break this rewritten fate. In a world without heroes, inherit the hero's sword and martial arts, and challenge the powerful enemy race that reigns. The fantasy masterpiece of the boy forgotten by the world "taking back the real world" begins!