MTL - Metropolitan System - Chapter 37 This is the case.

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

I was reincarnated in a game-like otherworld.[ Warning! When acquiring an active skill, all stats will decrease by 80% for each active skill! ]...What the hell.

A man who was locked up to cultivate immortality finally achieved it, becoming immortal and reaching the very peak of existence.But to achieve immortality, he was forced to give up one thing he loved the most, and that was sex. He was a man whore before he was set on the path to cultivating immortality. He could seduce any woman during his time as a mortal.But now that he has achieved immortality and has omnipotent, he wants to go back to his old ways, finding pleasure in tasting different types of women.______________________A/N - This WN is focused on sex, there is a story but it is very slow, MC's focus will be on women since this is a sex story, as for the plot, it really doesn't matter, being omnipotent means no matter what the antagonists do, it is useless, but there will be something to look into when it comes to the plot as I don't want to make it boring to you readers.WARNING.This novel consists of extreme sexual content, for example, hardcore BDSM, sharing, public display, gang bang, corruption, manipulation, and every other kink that I want to put in.If you are uncomfortable with any of the following, do not read.

Caution: This novel contains R18 content.