The Demon Lord Hates Reverse Harems

For over ten thousand years, I toiled and rolled around in the Demon Realm. I conquered all 666 floors of the Demon Realm. I gathered loyal vassals to serve me. After enduring countless hardships, I finally returned to my homeland, Earth. I thought I could finally live in peace. “My Rangrang, it seems you still don’t understand me.” “If it means I can remain in your memory this way, I can endure being lonely and unhappy as much as it takes.” The (former) Demon King and (ex-)fiancée who chased her all the way from the Demon Realm, “You know that even the tiniest bit of affection from my master is a desire I dare not covet, don’t you?” “So, surely I can throw this small tantrum… can’t I?”...