MTL - Black Technology: Starting From the Space Jumping Machine - Chapter 169 visitor

A human from Earth is thrust into the [Hunter x Hunter] world, becoming the Zoldyck family’s defiant, red-eyed prodigy. They call me a genius and the rightful heir, but I say that’s Killua’s burden to bear.Armed with crimson eyes, and a subtle yet powerful system, I’ll rewrite destiny, upend the world, and embrace the chaos with a wicked grin.

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

Lan Hengsheng was once the pride of the Lan Clan, a child prodigy with limitless potential—until his fifth birthday changed everything.Declared spirit coreless, he was abandoned by those who once praised him, dismissed as a mortal in a world ruled by cultivators. His so-called friends turned their backs on him, and the clan that once held him in high regard saw him as nothing more than a disappointment.But Hengsheng holds a secret—one that defies the natural laws of this world.Ding![Make a wish] He wished for everything! With the ability to create a system, he doesn’t need talent. He doesn’t need fate’s blessing. He can program his own path to immortality.Why struggle for enlightenment when he can create a Cultivation Optimization System?Why waste decades training when he can install a Time Acceleration System?Why risk his life searching for treasures when he can develop an Auto-Farming System?While other cultivators beg the heavens for guidance, Hengsheng writes his own cultivation manual.Armed with his cheat-like power, he will challenge geniuses, reshape sects, and rewrite the very foundation of cultivation itself.The strongest cultivator is a system maker!