Top Delinquent of the Demonic Sect

Hey, I'm Gucheon (The Highest Sky), the strongest of the Demonic Cult. Anyone know how to get back to the Cult? Gucheon, the absolute being who trampled the martial world and ruled at the very top. He was the one who led the Demonic Cult to its peak, and to the righteous sects, he was called the Heavenly Demon. The final war against the Demonic Sect, launched by the combined forces of all sects, including the Nine Great Sects. After a fierce battle, Gucheon was killed by an unknown entity. Just when he thought everything was over... He opened his eyes , not in Jianghu, but inside a weak body in the modern era?! "What the...?! Where is this crazy place?! Send me back!!" Gucheon descends upon the modern world...!!! (Source: Kakao Entertainment Corp., translated)