The Heavenly Demon's Broadcast From the Demon Realm

Supreme under heaven, peerless throughout the land! Chi Yu-rang, the Heavenly Demon and greatest warrior in the martial world, gets trapped on a mysterious unknown island called the “Demon Realm” by an unknown force. After ten years of solitary survival, he discovers through a mysterious device that four worlds have merged into one. To reconnect with the outside world and ensure his own survival, he makes a drastic decision — returning to youth in the body of a young girl. “Thank nyou, Heavenly Demon-nyan~! ☆” Reborn as a beautiful young girl, the once-fearsome Heavenly Demon Chi Yu-rang — now nicknamed “Heavenly Demon-chan” — must conquer the streaming platform Kwitch and find a way to escape the Demon Realm. Source: MU Includes 4 side story chapters.