He transmigrates into the world of Pirate King and gains the ability to strengthen anything without limit. And so...
Sengoku: "Why can't even our strongest warship withstand a gentle bump from that little wooden boat?"
Hawk-Eye: "I can't believe my black blade's slash lost to the most ordinary wooden sword..."
Kaido: "I've never seen a monster like him. I don't even have the courage to let him punch me a second time..."
Red-Hair: "Apart from Captain Roger, I've never seen Haki that powerful. And what's even more infuriating is that he's only a few years old..."
Empress: "He's small, but some parts of him are astonishingly big. I love him to death..."
Lin Chuan: "There's nothing in this world I can't strengthen. I can turn a little wooden boat into an aircraft carrier, a wooden sword into a divine weapon, and my fists into something that can pierce Heaven and Earth. I can strengthen my Haki until it clears the skies in an instant. I'm still a kid, but I can even strengthen my, you know, manly abilities..."
This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.