Mushoku Tensei (WN) - Volume 4

【Follow the Ship】【I'm a Marine on My Own】【System】Ike thought he could convince Luffy to give up being a pirate, but instead, he ended up joining the Straw Hat crew. To make things even more awkward, he awakened the Justice Marine System—but luckily, he had a letter from Garp appointing him as a Private Marine. This meant that all the good deeds done by the Straw Hat Pirates would count as achievements for the Private Marines.Arlong: “So what if the Straw Hats defeated me? It’s not like I’m wanted.”Ike: “Huh? We’re a Private Marine crew. We just fly the Jolly Roger, but we’re not pirates. Why would we be wanted? One call, and the bounty is gone.”Crocodile: “The Straw Hats are in Alabasta. Why isn’t the Marine arresting them?”Marine officials: “Huh? They’re Private Marines, not pirates.”World Government: “The Straw Hat Pirates destroyed Enies Lobby! Arrest them immediately!”Ike: “Who said that? It was clearly that idiot Spandam who pressed the Golden Den Den Mushi, and the Buster Call wiped out Enies Lobby. Our Private Marines were just there to eliminate Spandam—the real culprit behind the destruction.”

In a fantasy world ruled by kings and queens possessing great magical power, Kant Icurus Maybale is the only prince on the Aceaton Continent who does not possess magic. However, what he does possess, that nobody else does, is his past memories of the time when he was a Mechanical Engineer on Earth. With nothing but knowledge, brains, and wisdom, he dares to bring this medieval-esque fantasy world into the industrial era, and gain unimaginable wealth and power. Along the way, powerful forces that feel threatened by his rise in dominance will do whatever it takes to bring him down! Will he be able to conquer the continent, and potentially the world, to usher in a new age, or will he get crushed by the existing world order?

As the era of dragons gradually came to an end, as arcane masters left countless riches and legends under the starry sky, one awakened youngster after another began to set foot on their journey.

The world is about to be destroyed to make way for an interstellar transmission array formation. A young man journeys through the stars to save his home. A bloody fantasy adventure.

- Description from novelupdates