What It's Like Being a Vampire - Chapter 611 - : Changing the World

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

Suzuki, an adult programmer, suddenly notices that he’s been thrown into a different world while wearing a casual clothes at level 1. He gained high levels and treasures after using the 3 times use-disposable-magic, Meteor Shower, once. After that he intends to do different world “sightseeing tours”? He meets 3 beast girls, beautiful purple and black haired sisters, and an eccentric blonde haired elf girl along with various people during his trip. Although there are occasional fighting with demons and demon lords, this is a heartwarming fantasy story at heart.

A young surgeon, who is struck by a system, embarks on a bizarre journey of life.

While they mine for gold, I dig graves.While they use healing ointment, I munch on graveyard grass.While they take Mana Potions, I light incense and candles.While they meditate to recover, I rest in a coffin,While they attack with magic, I retaliate by tossing paper money....Let's see how a skeleton turns the tables in an online game, stirring up chaos to become the ultimate boss!