SpiderGwen: I have a system?! - Chapter 319: Return to Battleworld

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

It was only last year that I realized that the world I had been reincarnated into was the world of the Romantic Comedy book. What's worse, the person I had reincarnated as was someone featured in the book.A running gag character who the Main Characters ran into at the most random times, of no use, and who would disappear as quickly as he appeared—an Extra C.Last year. A year before starting High School.It was already too late.Extra C had already become...

Rudel Arses, the first born of one of the ‘Three Lords’ of the Courtois Kingdom, is from a corrupted family, but at 5 years old, he saw a dragon in the sky and his dark future as a villain changed. He was considered an idiot, but was that true? How would his effort to become a dragoon change the kingdom?

To correct the mistakes of his past, a young man is forced to narrow the space between science and witchcraft, as he ventures on a quest to save his world from complete destruction.