Naruto System in One Piece - Chapter 529

The constant mission is getting redemption.

Shuttle though various worlds to become a variety of scum men, do a little whitewashing and become a good man in the eyes of everyone.

Redeem those who are miserable, and let them live a happy life.

- Description from Novelupdates

Justin, a skilled gamer, is pulled through a dimensional gate into a dungeon resembling his favorite game—just three days before the end of the world. Faced with monsters and ancient magic, he rises from novice to the most feared dark magus , surpassing all others. Witness his unstoppable journey to ultimate power as he races against time and destiny.

When Zen was just five, his kingdom fell in flames. His people vanished into dust. His parents - his world - were taken by death. Left behind with nothing but silence, the young prince was forgotten by history. But his story… was only just beginning.He walks alone at first. Weak. Broken. Powerless.But the fire in his heart never died.He seeks strength enough to tear through the heavens, enough to break the chains of fate itself. Not just to see the faces of his lost parents once more… but to take revenge on the ones who destroyed everything.But can strength truly reach beyond death?… or will it only turn him into something worse?This is not just the story of a fallen prince.This is the legend of The One Who Walks Beyond the End.

Jiang Chen accidentally traveled through and started his comprehensive journey.

The world is tentatively scheduled: Naruto – Attack on Titan – Blade of Demon Slayer – Sword Art Online – Detective Conan, etc.

————

In the Naruto world, Jiang Chen obtained the apprenticeship ten thousand times return system, as long as he taught his apprentices, he could get a correspondingly high return reward.

As a reward, Jiang Chen taught Hinata the black coffin he brought from the world of the god of death to Hinata.

During the Chunin Exam,

Neji: “Abstain, Hinata, you are not fit to be a ninja.”

Hinata: “I don’t want to run away, Brother Neji, let’s have a showdown! The turbid coat of arms is faintly revealing, and the unruly and arrogant talent… The Ninety of Destruction: The Black Coffin!! !”

Everyone: “You call your brother on the lips, but you actually kill him. This girl is too scary!”

(The introduction is weak, please move to the text~)

- Description from novelbuddy