One Piece: I’m in Impel Down, and Luffy Is My Brother

[Fan Fiction · Isekai · Overpowered MC · Hidden Identity · Male Protagonist · Face-Slapping · No Romance]

After transmigrating into One Piece, Carl becomes the half-brother of Luffy and Ace.

To find a place that includes food and lodging without overtime so he can slack off, Carl plunges into the supposedly impregnable Impel Down to become a jailer.

He awakens a check-in system: in the first year, he receives Kyouka Suigetsu; in the third year, he receives the Limitless technique...

And so, Impel Down gains a deputy warden who works nine to five. The legendary big shots on the sixth level become his sandbags for passing time.

Until the Summit War breaks out.

Sengoku issues a death order: kill the Straw Hat crew who broke into the prison on the spot!

Facing the live broadcast from countless Den Den Mushi, Carl sighs and slashes apart the gates of Impel Down with one blow: "Luffy, don’t be afraid. Big brother is taking you home. As for the Navy... sorry, but now it’s my off-duty time!"

One strike of Great Red Lotus Ice Wheelmarrow freezes ten thousand li, and the whole world goes crazy!