Silent Witch - Chapter Volume 9 3: That’s Why You Are My Eternal Rival.

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

Ryan «Quicksave» Romano is an eccentric adventurer with a strange power: he can create a save-point in time and redo his life whenever he dies. Arriving in New Rome, the glitzy capital of sin of a rebuilding Europe, he finds the city torn between mega-corporations, sponsored heroes, superpowered criminals, and true monsters. It’s a time of chaos, where potions can grant the power to rule the world and dangers lurk everywhere.

Yan Lan follows her mother's dying wish to hide her countless identities and live a low-key life.Who would have thought that one night, her sister Yan Xue has a dream about a broken wealthy family, and upon waking, steals her beloved and forces her to go on a blind date in her place.Yan Lan: Go for the blind date immediately, the match is the prince of the capital's elite circle.The sister waits and waits, expecting Yan Lan to follow her old path and become an abandoned wife of a wealthy family, but finally she receives news...Late at night, Yan Lan returns home after a quarrel.The former true love: Brother, I have a stomachache, can you come to see me?The new wealthiest and prince: Block and delete in one go, don't disturb me while I pack my small bag to sleep on the floor at my wife's place!

Soma, a college student and also an orphan, who is on his way back after finishing his part-time job, plus his college in the morning, made his life feel monotonous. Still, of course, he didn't have any complaints about the situation he is currently in.To distracted his exhausted body and mind, Soma always finding some times to enjoy the web novels.As a person who likes to immerse himself in the world of novels to find some enjoyment, every day at night, he always reads a web novel he has read for years, and it is called Chronicles Saga.***Chronicles Saga is one of the many web novels that were serialized years ago, and it's already nearing its end game with a couple of final chapters.The story was depicted in an alternate Earth where Magic, Dungeons, Sword, and System exist.It tells the story of a young man who holds high justice in his heart named Leon, who has been chosen as a savior trying to save the world from the incoming disaster in the future by the great Demon Lord.***Then, an unimaginable thing happened to Soma when he suddenly got transmigrated inside the story he read for years. Not as a protagonist who led the story or a Villain but as a 'Side Character'.Soma was transmigrated inside the body of a young man with the same name.To make things much worse, he is being transmigrated into one of the crucial scenes, which becomes a turning point for one of his favorite Heroines in the novel.Then, one thing led to another as Soma was thrown into multiple events. He discovered that the boy named Soma had an unexpected mysterious background and past coming from a ‘Side Character’ who had no role in the main stories.Follow Soma’s story inside the novel world he transferred into as a Side character that will overthrow the story and the world, with his reliable comrades.