The Sword Hero Abandoned by the World Decides to Become the Demon King

In an age of peace, heroes receive no recognition. Defy the rulers' wishes, and you'll be disgraced.

"Killing people is getting easier and easier!"

The hero swings the Demon-Slaying Holy Sword in his hand, and blood sprays three feet.

"If there's no Demon King, then I'll become one. All the malice the world has shown me will be repaid tenfold!"

That day, people finally remembered the terror of being ruled by the Demon King.