Pirate: My Days as a Prisoner in Impel Down

Ron Black, a third-class Marine, has zero merit in twenty years of military service and is recognized as a waste by the entire battalion. No one knew that he had eaten a Devil Fruit that was marked as "trash" in the illustrated book - the Cage Fruit. He became stronger and stronger as he remained in a closed space. He has only one goal in life: to live in the Impel Down City, the underwater prison, and live in peace and stability for the rest of his life. But the more he wanted to hide, the less the world would allow him to hide - he was forced to retire by the instructor during the recruit period, forced to go to the battlefield by Akainu during the devolution period, and finally sneaked into Impel Down City as a guard, but was dragged out of his comfort zone again and again by Luffy's escape from prison, Blackbeard's invasion, and the recruitment of the top war. "I just want to go to jail, why is it so difficult?" On the day he finally entered Level 6 as a prisoner, all the thugs on the floor came to "welcome" him - they all pressed him into the wall for five minutes. "Can you please stop making trouble? I'm going to bed." This is an outrageous story about a man who gets stronger as he goes to jail and uses "gou" to fight against the entire world.