Pirates: Take the Initiative to Enter the Impel City at the Beginning

When I traveled to the world of pirates, I used to be a big pirate with a bounty of 500 million, but why do I feel like I can't beat an ordinary person now? Could it be that I'm traveling through time in the physical body, okay? I can only practice little by little on my own, and I haven't finished my emotion yet. An uncle jumped on my boat and I recognized him as Iron Fist Garp. In order to avoid being beaten to death by him, I voluntarily surrendered. Don't think this is spineless. Isn't the food in Impel Down City delicious? Everyone there is talented and well-spoken. I have decided not to escape from prison until my strength is raised to the level of a general! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.