You Were Sent to Infiltrate the Navy, So How Did You Become the Fourth Admiral?

After transmigrating into the world of One Piece, Lin Fan is sent by Doflamingo, the underground emperor of the dark world, to infiltrate the Marines.

Just then, he activates the Justice System. As long as he becomes a Marine who upholds justice, he can earn rewards.

With the System's help, he keeps earning military merit and rising through the ranks.

Then Doflamingo prepares to use Lin Fan to uncover Marine secrets.

Lin Fan: "So it's you, Doflamingo... A spy? What spy?"

"Sorry, I'm the Marines' newly appointed Fourth Admiral!"

"I had no choice before. Now, I just want to be a good person."

"If you know what's good for you, tie yourself up and submit to the judgment of justice!"

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.