One Piece: Unreal Adventure - Chapter 86: Teaching Navy Techniques

The Swordmaster who has returned by chance to save the world!

Among the professional strategy warfare gamers on earth, Lin Qian easily emerged as the strongest within the industry. After all, there weren’t many who could defeat a perfect example of a hardcore casher!With a twist of fate, the extravagant gamer left the world in an unfortunate accident. Leaving behind his wealth, he was transmigrated.In this new world, Lin Qian had absolutely nothing he could be proud of. As an alchemist, his brewing pot exploded. As an iron welder, cast-iron turned scrap metals. Not to mention, his dismal talents extended to spiritual arrays and beyond. Besides his slightly above average talent in cultivation, he did not possess anything else that had even a slight semblance to a talent.Yet, life was not all bleak. On one fateful day, he discovered a revolutionary change. The mega-empire which dominated the gaming servers, the very land which he reigned over as emperor, had followed him through his transmigration. Not just so, the invulnerable generals, lieutenants, and the million men army had escaped the realm of mere codes and gained the breath of life.Now, as living beings, they swore their allegiance and lives to him, their Peerless Emperor.

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

The first time they met they had battled fiercely, just for a mere bunch of herbs. She needed it to save people, and he wanted to use it to save his own life.