The strongest sign-in in the nautical world

After coming to One Piece’s world, there were all kinds of sign-ins and rewards. If he was not careful, he would become the strongest existence in this world. It turned out to be so simple. He had already imagined many difficulties, but he did not expect it to be so simple. He only needed to sign in and he could obtain all kinds of generous rewards. It was so generous that it was unimaginable! Completely unexpected!