After Saving the World, Spiritual Energy Actually Revived!

(Spiritual qi revival, wish-fulfillment male lead, spirit beasts, no harem)

I just saved the world, so how come I’m not human anymore? And why have all the people from another world shown up on Earth?

Witch: “Even if you’re not human anymore, do you think I wouldn’t recognize you? You took my innocence, so you’re going to die by my hand!”

Imperial Princess: “Brother Hero, no matter what you’ve turned into, you’re still you. Do you remember what I told you ten years ago? I said I’d marry you!”

Catgirl: “Long time no see. Now that neither of us is human, are you still going to reject me?”

From now on, I’m done being human. I’m done being a hero. I’m the Demon King, and I’m going to destroy the world! Nobody’s gonna stop me!