Pirate: My Quick Slash Can Be Upgraded

When he woke up, he was reborn in the world of One Piece and became a user with the ability to kill the Quick Slash Fruit. I thought I could easily win by relying on intelligence superiority, but to my surprise, the All-Thing Cutting System was awakened. From then on, he cut through iron, sea, and air, all the way to a new realm. However, when he cut open the Red Earth Continent, the system suddenly prompted: "Congratulations to the host for unlocking 'Cut off Cause and Effect'..." Wait, isn't this style of painting a bit off?