He is a young man from the future world, where he has developed magical skills and met four friends who share life and death. The Demon Lord, who was about to rule the world with the combined power of the five, was defeated. Because of his victory, he returned to his original world and forgot about the past. But in the end, he discovered that the Demon King was not dead, and he picked up the magic weapon and fought with the friends from the past again.