Tensei Kenja no Isekai Raifu ~Daini no Shokugyo wo Ete, Sekai Saikyou ni Narimashita~ - Chapter 8 - The Test Begins

In a world where humanity struggles to survive against rampaging beasts, Reid Fletcher, once a member of the powerful Fletcher family, has been cast out and abandoned. Born with pitifully low soul power, Reid’s future seemed doomed in a society that values strength above all else. Forced to live in the scrapyards, a forgotten wasteland where the outcasts scavenge and survive, Reid discovers a hidden potential—an ancient artifact known as the Evolution Codex. Read to find out how Reid's journey will unfold. Will he rise to the top or remain a nobody forever?

《The Peter Pan who doesn’t want to grow up, Wang Chao & the Poor and Handsome Cinderella, Xie Zhuxing》

Two plain Jacks, one annoying and one scheming. An idiotic story that might not be sweet.

- Description from Novelupdates

Choi Hyun-seok, a heavyweight champion of the biggest mixed martial arts league on Earth and the one who was called the strongest had died.Afterwards, he was granted new life as a hero in another world.‘Wealth! Honor! Endless beauties at your fingertips!’With thoughts of such a dazzling future, the first thing that he saw when he came to this new world was a towering ox monster.The monster, who was the commander of the demon army, asked.“Hero? You’re saying you’re the hero?”“Uh…I think…?”And so, that was the start of hell.

A college student, accidentally reborn into the world of Naruto, becomes a member of Uchiha who is destined to be exterminated.

In this cruel ninja world, in the face of endless wars and exclusion from the village, what will Uchiha Qing do?

PS: Later in the book, the protagonist will develop a system of immortal cultivation. Cultivating Immortals in the Ninja World, have you seen it?

- Description from novelbuddy