Demon Boss in the Human World - Chapter 88

Four years after the Third Nightmare, something unexpected happens. A group of people find themselves in a strange theatre, which tells them to react to someone's story...?

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

Grass and trees could become fairies and even snow and frost had spirits!

After suddenly dying from pulling all-nighters, Jiang He discovered that he had arrived in a miraculous world of beast taming.

He could form contracts and tame beasts. By uncovering hidden evolution pathways, he discovered unique skills for his monsters and explored this unknown world!

He became a legendary beast tamer and champion of the World Beast Taming Championship. As the Master of Light and Shadow and the Ruler of the Snow Domain, he was asked how he had obtained his achievements.

He answered, “I merely relied on making my beasts happy.”

Jian Chen, the publicly recognized number one expert of the Jianghu. His skill with the sword went beyond perfection and was undefeatable in battle, After a battle with the exceptional expert Dugu Qiubai who had gone missing over a hundred years ago, Jian Chen succumbed to his injuries and died.

After death, Jian Chen’s spirit was transmigrated into a completely foreign world. Following an extremely fast growth, his enemies piled up one after another before becoming gravely injured once more.

On the gates of death, his spirit had mutated, and from that moment henceforth, he would tread on a completely different path of the art of the sword to become the sword god of his generation.

- Description from novelupdates