Demon Slayer: From the Start, I Have a Villain System, and I'm Done Acting Human

The protagonist is a pure villain: shameless, rotten to the core, and never up to any good. He's antisocial, a menace from birth, and mentally unstable.

What's it like to transmigrate into a villainous cannibal monster?

Jack, Gotham's famous thinker, once said:

"All it takes is one bad day to turn a good man into a madman."

Dongye Xuan had always thought this was just artistic license in a comic.

He forgot that art also comes from life.

After an utterly dreadful day, Dongye Xuan has an incredible stroke of luck and transmigrates to the world of Demon Slayer. But he becomes Hantengu before turning into a demon*, locked in a prison and awaiting execution by beheading.

Once he understands his predicament, Dongye Xuan realizes one thing: being a good person gets you nowhere!

He will become a villain, a greater villain than anyone else!

He'll start with Demon Slayer and turn the world upside down!

The timeline begins very early, so the story takes a while to reach the main plot, and there will be a lot of original content..

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Please do not imitate.