Unrivaled under the heavens! The strongest in Jianghu, Heavenly Demon 'Chi Yoorang', is trapped on a mysterious island, the Demonic Realm, by an unidentified force.While living in solitude for 10 years, he learns through a mysterious device that four worlds have merged, and decides to undergo body rejuvenation to survive and communicate with the world..."Heavenly Demon Nya~ Thank you, nya!"Will Heavenly Demon Chi Yoorang, newly reborn as a beautiful girl Heavenly Demon—no, 'Heavenly Demon-chan'—be able to conquer Qwitch and escape the Demonic Realm?