Luffy, My Hardness Is Off the Charts

He transmigrates and becomes Luffy.

He awakens the Hardness System.

He can increase and strengthen his hardness without limit.

Kaido: "This guy's made of iron! No matter what I do, I can't hurt him at all!~"

Shanks: "No one can compare to his sheer hardness!~"

Akainu: "What?! I hit him with a Great Eruption and he didn't even get hurt!~"

Big Mom: "Compared to him, I'm so soft!~"

Loki: "You can hammer him all you want and still can't kill him!~"

Imu: "The Ancient Weapons just tickle him?!"

Luffy: "But the beauties say I'm just right and warm. Why's that?~"

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