One Piece: My Crew is from Other World - Chapter 42 – Ace!

Thousands of years ago, a small planet collided with Earth and destroyed the world. In five days, ninety percent of humans had been wiped out, leaving behind the last ten percent to earnestly struggle on death’s door.

Jinyu was one of those people who survived. Due to a special heredity trait, he could understand beast language. After the apocalyptic disasters, Jinyu had been living for a month with the few small beast brothers that he’d subdued. Previously, Jinyu had thought that he would live like that until he died. Yet, inexplicably, one day he opened his eyes to find that he was in a monstrous, lawless world that was full of vitality and life.

Jinyu’s transmigration into the future let him skip over almost one hundred thousand years. In the year 106825, beasts rule the galaxies and ‘pure’ humans are extinct. As the one and only ‘pure’ human left in the entire universe, Jinyu braves this new chaotic world to find a place for himself and thus begins to work at Beast Store number 138.

- Description from Novelupdates

Okay, so let me get this straight. I wake up and BAM, I'm inside the body of Valerian Thorne—a third-rate villain. I mean, come on? Out of all the characters I might have been reincarnated as, it had to be him? This man was literally a stepping stone for the actual hero. So why him? Why not someone with a little more. potential?Now that I have a system that can unleash Valerian's hidden potential, who knows? Perhaps this third-rate villain will get a second chance, alter his destiny, and prove the world what he is truly capable of. And if I happen to get to keep the gorgeous fiancée in the process. well, I'm not complaining.

Travel through the world of martial arts, get a god-level kidnapping system, and vow to be the number one kidnapper in the universe.

As long as you don’t want to tie it, there is nothing you can’t tie!

Guo Jing, your daughter has been kidnapped by Lao Tzu. If you don’t want me to do anything to her, you can exchange it with Jiuyin Zhenjing and Eighteen Palms of Subduing Dragon!

What, so obedient?

Then I’ll give you a grandson for free.

…………

Yang Guo, your aunt was kidnapped by Lao Tzu. If she knew the face, she would have cut up her own little penis!

What? Yin Zhiping, do you want to cut too?

Well, I will send you a dragon-slaying knife, cut iron like mud, and guarantee that there will be no pain!

…………

Duan Zhengchun, your wife and daughter have been tied up by Lao Tzu, hurry up and hand over all the martial arts secrets of Yi Yang Finger, Six Meridian Divine Sword, etc., and then kill yourself!

What? Want to have sex with your wives again before you die?

Fuck you, they have been scolded by Lao Tzu “Japanese…

- Description from novelbuddy

This story is about a rookie researcher, who was forcefully dragged away from his restful life, compelled into facing various killers and zombies, always having to risk his life at the brink of death, and finally becoming an advanced researcher that is acclaimed by all. And throughout his adventure, he met an alluring(?) killing machine, who he started to have fantasies on after they had an accidental kiss…

Xiao Yan: Did I fall for him? But he’s a man!

Maya: Who knows…. maybe it’s the other way round?

- Description from Novelupdates