Zhengdao Thinks I'm Useless? Turn Around and Marry the Demonic Empress

This is a world where good and evil confront each other. In order to save the right path a hundred years ago, the protagonist suppressed the Demon Abyss alone, resulting in the loss of all cultivation and being contaminated with demonic energy. In this world, the righteous path is hypocritical and pays attention to interests and purity of blood; the demonic path, although acting arrogantly, places more emphasis on friendship. After the protagonist returns, he faces the betrayal and abandonment of the righteous way, and finally chooses to fall into the arms of the Demonic Empress, starting a counterattack in which "the wife is more valuable than the husband" and awakens the supreme constitution of the Demonic Way. The next moment, demonic energy filled the sky, and the empress descended: "Who dares to bully my worthless husband?"