The Rat Race Starts with the Demon King

An overworked office drone dies suddenly and transmigrates to another world.

He is reborn as the Demon King's son.

After racking his brains over plots and schemes, he finally rises above the rest in the struggle among nine princes for the throne. He barely has time to settle in before suddenly dropping dead.

Reborn at the time when he and the other princes are fighting for the throne, he thinks, "Ha! Come on, brothers, let's outdo each other! Let's tear one another apart."

He becomes the Demon King behind the scenes, while also raising a female city lord, saving the future Saintess, and training a female hero.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.