Invincibility Begins with Mastery of Fist Techniques - Chapter 170 - 164: Suspicious

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

Yuseong, a genius doctor who made a name for himself in the medical community, considered the operating room his home. One day, he died in a traffic accident, and when he regained consciousness, he found himself in another world.But… Saint… Holy Kingdom… Healing magic?“I worked so hard to learn medicine, and now you’re telling me I can just touch someone and they’re healed? Oh, I’m going to lose my mind.”

If mercy and kindness can't save the world, then this time, I choose violence. I was reborn in death, like sin under the blazing sun.——Ethan ColeHuff... What’s going on?There’s a flight attendant with a D-cup sleeping next to me!?Did I really get reborn!?Back to fifteen days before the zombie apocalypse game starts!?[Ding! Congratulations, lucky one! You’ve been granted a one-time chance to be reborn, along with a spatial storage ring!][Ding! Please choose: Join the humans or the zombies?]A cheat ability, and a storage ring!?If I choose to be human, I can stockpile supplies, hang out with different women in a safehouse... Isn’t this the perfect start for a post-apocalyptic hero?“So this time, I choose... zombies!”God: “Idiot!!! If I’d known, I would’ve given this rebirth chance to someone else!”