One Piece: Building the Strongest Pirate Crew

[Main storyline focus in the early chapters] + [Building a faction] + [A heroine who barely appears] + Some details will be changed

As Luffy was nearing the end of his life, he accidentally activated the Pirate-Training System and was reborn as a young man.

To rescue his brother Ace, he began recruiting allies on Impel Down's Sixth Level.

“Shiryu of the Rain, how about becoming my partner and causing a huge commotion in Impel Down?”

“Heh, what an interesting kid. I hope life as your crewmate will add some excitement to my boring life.”

“Crocodile, will you be my partner?”

“Heh. Luffy, you aren't qualified to be my boss.”

“You won't be my partner? Then I'll have Ivankov turn you into a woman and take a ton of pictures to send all over the country.”

“You little...” Crocodile was speechless with anger.

(The synopsis isn't doing this justice, so please check out the story...)