Marineford War, Sengoku: I Actually Have a Younger Brother

On the eve of the Summit War, news of Ace's execution sends the Four Emperors of the New World into a frenzy.

To improve their chances, Sengoku, the Navy admiral, decides to seek reinforcements.

My name is Reno. I arrived in the world of pirates and became brothers with Sengoku.

I bound a sign-in System. Signing in every day improves my physical attributes in every way.

So while Sengoku went off to serve in the Navy, Reno decided to lie low and steadily build his strength.

One day, Sengoku, now a Navy admiral, personally called him over a Den Den Mushi to ask him to fight the pirates together.

The Summit War begins, and one man wipes out the entire Whitebeard Pirates.

This battle shakes the world.

Kaido: Stop saying I'm the world's strongest creature. That guy in front of me is the real weapon of mass destruction.

Shanks: In front of Reno, even the Face-Face Fruit is useless.

Reno: Family should all be together.

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