After Swapping Souls, I Punched Kaido to Death

Yuan Fei transmigrates to another dimension and becomes Kaido of the Beasts during Kozuki Oden's era.

Build a fleet, take control of Wano, then buy artificial Devil Fruits to create an army of Beasts?

No, no, no.

Yuan Fei: First, I'll sneak into the East Blue and wait for the child of destiny to be born, then pull off a soul swap.

And so...

The fearsome pirate Kaido meets his downfall in the East Blue. But the culprit is a baby who has just turned one month old?

Why did Red-Haired Shanks lose an arm in Windmill Village and flee back to the New World in such a sorry state?

Garp: Luffy, just what kind of monster are you...

Yuan Fei: What the hell is this Luffy nonsense? My name is Yuan Fei, and I'm going to be King of the Marines!

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