One Piece: I Got the Gum-Gum Fruit in the Real World

A cancer-stricken boy in the real world becomes compatible with the Gum-Gum Fruit and discovers that this world has not only the Marines and Sea Kings, but also the Six Powers and Devil Fruits.

But this world has neither the Three Types of Haki nor awakened Devil Fruit powers.

So Wang Xuan shouts, “I’m going to become the creator of the Three Types of Haki and the strongest of the Marines. You can call me the Marine King!”