Big brother, I want to be the strongest in the world in Pirates

Introduction: I wanted to change my job as a swordsman, but failed to change my job in the Dark Thunder Ruins and became a berserker. Kazan, a ghost-handed white-haired boy suffering from Kazan Syndrome, came from Arad to wear a sword in the world of One Piece.From a lonely person to a big family. "Xiaosha, do you want to recognize me as your elder brother? I'll teach you to comb your hair back." "White Beard, take your son to recognize me as your elder brother!" "Akakenu, become my stinky younger brother!!!" "This princess sister, you were arrested by your elder brother." "Yes, from today onwards I will be your elder brother!" "Let's go wild in the sea in my name."