I Killed the Demon at the Beginning, and I Turned Out to Be the Demon Lord of the Abyss.

The world has fallen, the sky has cracked, and the homeland has been invaded by alien races - the old order and glory have long been reduced to scorched earth. In the cycle of despair, it is said that every time everything is reset and civilization is overturned, a "savior" will return from the abyss. The monsters he killed began to bow to him, and the demon he suppressed knelt on one knee and called him by his true name—— It turns out that he was never the chosen "savior". But those who have been betrayed by all living beings, sealed and forgotten... The origin of the devil. Now, both the realm of gods and hell have opened their thrones to him, It is human civilization that deserves to be saved, Or is Chaos Devouring the ultimate answer? Chen Fan stood on the cliff between the two realms, His choice will be the outcome of the last copy. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.