Once upon a time, there were two tribes who had been quarreling with each other. The both could use magic. The long quarrel between the magic and the magic gave rise to a chaos, and it led a Dark dragon to the world from an abyss.

The dragon was called the king-dragon of Garsis. Garsis burned down the whole world, and the world was about to be destroyed...

The both of two tribes noticed the mistakes, then united against Garsis, and made the sword of Dragon Slayer to defeat the king-dragon.

A brave man appeared. He got a ultimate power by the sword. He could cut up even a mountain and split a ground in two with the sword. He fought against Garsis and won.