In Naruto: Reborn With Talent - Chapter 365 - Ch365. Chunin Exams: Orochimaru

【Let me laugh’s new book, you know what I mean, the quality is guaranteed!】 The Reincarnator Chu Ge was unfortunately bitten by a Black Cat, and because of this, was pulled into the Survival Arena. Upon entering the Survival Arena, humans would randomly transform into animals or plants to compete in life-and-death struggles, with the losers completely turning into animals and living in a daze in zoos forever! Bedrooms, parks, mountain peaks, boundless grasslands, azure seas, and magnificent atmospheres—all became arenas of competition! In the Survival Arena, Chu Ge became an African Lion! Lions fought tigers, dragons contested with pythons! Chu Ge said, “In the survival of the fittest, I must survive!”

Have you ever thought that the state of the world as it presently is, could revert to the laws of the ancients? When a series of strange incidents beginning with the disappearance of his friend led Luo Yuan to question the possibility of an apocalypse, he becomes embroiled in the midst of a global-scale chaos.

Evolution has turned the flora and fauna of the vast and bountiful Earth into something that had never been seen before. Coincidentally, the all-dominating Homo sapiens have ended up at the bottom of the food chain. From mystery to crisis, will Luo Yuan discover a means of saving humanity by racing to the top of the food chain? Or will he strive in accordance with the law of the jungle? It is the dawn of an age of the survival of the fittest.

- Description from Novelupdates

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!