My Classmate is 200 Million Years Old - Chapter 21

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

At the beginning of the universe, there was only chaos. Chaos gave birth to a world, accumulating into Black and White and the five elements (also known as the Origin Elements), creating the world's laws and the order of heaven and earth.

This world was called the Origin world, where the Original beings born out of chaos reigned. They created orders, creatures, and numerous worlds where they reigned as Supreme beings until a calamity befell them and destroyed the Original world alongside numerous worlds.

Two billion years have passed since then. In a small world somewhere, a baby was born carrying an unusual past.

Scheming female assassin transmigrated to become the weak Eldest Miss, her story is wonderful and stunning, attracting peach flowers to blossom open. Cold calculating emperor? Genius bad crown prince? Insidious happy-go-lucky prince? Gentle physician? Ice-cold mystery male? Who is her true love? Haha, but she only eats, definitely will not take responsibility! Beautiful men be careful!

- Description from Novelupdates

With the descent of the first blood rain, the world underwent a dramatic transformation.Once bustling cities became playgrounds for zombies.Some people merely survive in this post-apocalyptic world, while others thrive using their strength in this new world.Opportunists are on the move, and lone wanderers roam the land.Firearms, artillery, superhumans, and mutated creatures drive the world in a new direction.Clove Russell is reborn at the dawn of the apocalypse, leveraging his Space Element superpower to unlock the genetic limits of the human body, dominating the post-apocalyptic world without rival.Linda: “This bastard has no feelings whatsoever, only using me to vent his desires!”Kelly: “He's so strong, so formidable!”Wendy: “I will conquer him! Clove conquers the world, and I will conquer Clove!”