Primordial Sin System - Chapter 1 - The Beginning

A botched rescue mission with an unknown objective cost Zhou Yu his team members, while leading him progressively closer to the multinational biotech corporation Juli’s research core.

In order to protect his botanist younger brother Zhou Qing, Zhou Yu accepted employment under the Juli Corporation, and is dispatched to a parallel world—Nibelungen.

Nibelungen’s biological systems are completely different from the world Zhou Yu is from. To live in this place, Zhou Yu must follow three great laws:

The first law, fear is the sign of the hunted, so you must never show fear.

The second law, the more beautiful an organism is, the more dangerous they are. Do not approach them, and do not trust them.

The third law, do not be misled by the mimicry of S rank organisms. They understand your mind, and they know how to entice you. Always remember that they have no human emotions or love. All humans are no exception to them.

Finally: We wish everyone can live happily in Nibelungen.

- Description from Novelupdates

“You will be my wife one day.” Declared Liu Jun - the handsome and wealthy young master to his beloved childhood friend. He vowed to marry her at all costs. But that vow made him a villain. The woman he desired didn't return his love. Crazy and heartbroken, he crashed into her wedding, who was going to marry the love of her life, Liu Jin, unfortunately his own younger brother. Circumstances took a drastic turn, leaving him with only one choice to pay for his sins - His death. But fate gave him another chance. Liu Jun was reborn. In this new life, he chose to let go of his love and start anew. He discarded his villain's identity and closed his heart forever. But a new encounter and new troubles come knocking on his door with the secrets of his past life that even he doesn't know. Will the villainous Mr. Liu find his happy ending this time? *Excerpt* Ai said, “I forgot to clarify something. It seems you have a misunderstanding that I am interested in you because I stared at you.” Jun blinked once. “Rest assured that's not the case. I won't look at you that way. You are not my type.”

Suddenly being able to travel to various familiar worlds, to grow and develop in these various high-risk worlds, you need to follow the following guidelines:

1: If you want to get rich, don’t be afraid of death. If you are afraid of death, you can only eat other people’s leftovers.

2: Don’t always try to save the world, it will be bad luck to be a Virgin in other planes.

3: Don’t let go of good things, maybe you will lose a great opportunity because of this.

4: Don’t wantonly flood your feelings, you can only bring back sadness if you can’t take away the girl.

……

- Description from novelbuddy

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