Underworld Emperor Only Favors His Yin-Yang Concubine summary: He is the Nether Emperor who has the ambition to dominate the Three Realms, and she is the Onmyoji who guards the world. They are enemies for thousands of years, but they are entangled for thousands of years, and their love is unbreakable! She reincarnated for a thousand years, and he waited for a thousand years...