The Angel Descends: The Fallen Lucifer

I was once Lucifer, a six-winged archangel in the celestial realm. For Mili, the Demon King's daughter, I abandoned my identity as an archangel and went to the demon realm, becoming a fallen angel. During the war against the allied forces of gods and demons, Mili died, and I was defeated and forced to flee to the human world. I transferred my soul into the corpse of a dead human named Hill, and from then on, I began living as a human. I swear to the heavens that one day, I will defeat both the celestial and demon realms and avenge Mili. Not in the name of Lucifer the fallen angel, nor in the name of Hill the human, but in my own name.