The Demon God's Palm-Caged Prisoner

(Female-dominated world + female-centered + men suffer + one-on-one romance disguised as a harem + male lead is chaste) In a nutshell: A little divine man saves the great demon god who will destroy the world. Immortals and demons walk different paths, and fate cannot be defied, but he insists on changing destiny against the heavens. Xie Nannan is the most beautiful phoenix divine man in the Three Realms. To prevent the cataclysm that will destroy the world, he reverses time by a thousand years and finds Ling Canglan, a young demon who has yet to turn evil. He gives up eternal life and destroys his immortal bones, staying by the little demon’s side in the mud in a mortal body. He is the savior chosen by the Heavenly Dao, yet he must defy fate for the demon god who will destroy the world. A thousand years ago, Ling Canglan was a filthy little demon, hated and hunted by everyone. A thousand years later, she is a ruthless Demon God Emperor who has slaughtered the Three Realms. Xie Nannan sheds his divine bones and returns to a thousand years in the past. In his humble mortal body, he protects her, raises her, and guides her, yet she suspects him and torments him, removes his Adam’s apple cover to humiliate him, and leaves him drained and dying as her demonic energy devours him. Ling Canglan has never believed in love. She believes only in hatred. Surrounded by misunderstandings and toyed with by the Heavenly Dao, she becomes the demon god who will destroy the world, imprisoning him at her side and tormenting him at will, before personally extinguishing this one and only ray of light. He carries a Chaos Lamp and guides her out of the demonic path, only to fall into the endless abyss himself, his body and soul destroyed. She ascends the throne and guards an empty palace, spending the rest of her life consumed by endless regret. [There is only one protagonist: Ling Canglan. Please do not call the male lead in the official couple the protagonist.]