Pirates: Get the Ultimate Sharp Knife at the Beginning

[No system + the great swordsman who ate the fruit + has his own pirate group + growth type + funny jokes] Lei Luo, who graduated from college, traveled to the year 1511 of the Hainan calendar, and his age strangely regressed to 13 years old. At the beginning, you get a supremely sharp knife and eat a BUG-level fruit. I thought it was the highlight of my life, but this fruit was cursed, and I couldn't immediately possess the fruit's abilities. In desperation, he had to practice swordsmanship for ten years and mastered the fruit ability. With his strength greatly increased, he went to sea to seek the secret of unlocking the curse of the fruit. On the way, he met Luffy, who also just went to sea. ... His age was mysteriously regressed by 10 years, and he met Luffy when he went to sea. Is this all a coincidence? ... While traveling with the Straw Hat Pirates, Lei Luo used his knowledge from his previous life to help them grow rapidly. He even met his partners and formed a lost pirate group that overturned the world. And secretly cultivated a force that could rival the world government. ... As the secrets of the "Fruit Curse" are revealed, more and more mysteries begin to emerge. About Lei Luo, about Luffy, about the Celestial Dragons, and even the entire pirate world.