The Deputy Captain of the Pirate Slime Fruit

Travel through the world of pirates and become the deputy captain of Luffy! (Following the boat, funny, making up for regrets, no heroine, so what is Luffy's ultimate dream?) Luffy looked at He Feng, who could turn into a slime, with starry eyes and said: Can you be my partner. He Feng obtained the Great Sage System System, use Predator Ding, successfully preyed on spiders, and obtained the tenacious silk skill! Ding, the analysis is successful, and you have gained knowledge and domineering...