A long time ago, Hakuryuu was the Sacred Sword and Champion Warrior of the Star Dragon World's Light Dragon Continent. Nowadays, he is a simple warrior on Exile Island who battles for what he believes is right. He has returned to the Star Dragon World, along with a ginger-haired boy named Ryuuta Satoba, a pink-haired woman named Yuu Fukuri, and a Clone of Kokuryuu, who was once the Sacred Sword and Champion of the Star Dragon World's Nether Dragon Continent, before he ultimately met his fate.