Twin

Long ago...
This world consists of two conflicting worlds, the "World of Light" and the "World of Darkness", and these two worlds are protected and governed by their respective administrators. "Light" was ruled by the four spirits of fire, water, wind, and earth, and "darkness" was ruled by the Demon Lord Destark.
Desturk regards "darkness" as the source of ultimate beauty and supreme power, and begins to invade the "world of light" with evil power. When the battle began, the inhabitants of the "world of light" were helpless in front of the mighty and overwhelming power of Destark, and were gradually cornered and threatened with extinction. The spirits who learned of Deathstark's ambition to take over the world through "darkness" created a jewel with the power of holy "light" and sealed him deep underground in a different dimension. The world regained peace. But hundreds of years later the "World of Light," which should have been peaceful, was once again covered by an evil fog, and the king sent out a message to the whole country to find the jewels created by the spirits.