In the vast and mysterious Demon Realm, chaos filled the royal throne room.

Demons of all shapes and sizes whispered nervously as their ruler, the mighty Demon King, lay defeated. His enormous figure slumped against his shattered throne, his once-invincible armor cracked and smoking. A lone human figure stood before him, sword raised high—a hero from the human realm.

"Your reign of terror ends here!" the Hero declared, his shining blade glowing with holy power.

The Demon King gritted his teeth. "You think you've won, human? My daughter will not let this stand!"

And with that, he collapsed, defeated. The crowd of demons hissed and fled as the Hero sheathed his sword and walked away, leaving the Demon Realm in chaos.

Somewhere far from the Demon Realm, in the peaceful town of Midori, Kazuki Tanaka was wiping down a shelf of instant noodles.

"Buy one, get the second half-off," he muttered under his breath. His life wasn't exciting, but it was predictable. And for Kazuki, predictable was perfect. No surprises, no battles, no magical chaos—just the comforting rhythm of daily life.

Little did he know, that rhythm was about to be shattered by the arrival of a certain demon princess.