Where Did the King of the Underworld Go?

Blurb: For tens of millions of years, no matter how much Long Yu and Ya Yi argued and fought, neither had ever imagined a day like this. A forced separation, a calculated scheme, and Ya Yi's soul shattered into countless fragments. The Asura's fury, the destruction of several realms, and a world stained with blood, yet none of it could bring him back. The Heavenly Dao said, without the King of the Underworld, what reason did the Queen of the Underworld have to exist? Long Yu replied that a discredited Heavenly Dao was an absurd existence, and not irreplaceable. Across thousands of small worlds, there was a trace of that person's soul, a fragment of his spirit. Even if he had shattered into dust, I, the Queen of the Underworld, would piece him back together! Theme: