From Today, I'm a Player - Chapter 21: The Battle of the Rhine River

The world’s top level hacker, Shi Lei; due to him hacking the world’s top military powers during a joint exercise and attempting to steal information from them, ultimately leads him to get sold out by his own organization. This act eventually caused his own death by a missile bombardment.

God was playing a joke on him and allowed him to return back to six years ago, the autumn season of when he was still at his university. Being given another chance, plus the fact that he retained his ability as one of the best in hacking technology, Shi Lei decided to change his life! During his previous life, he was only an assassin in the dark. Although such an existence made people afraid of him, he would have to always hide within the shadows. In his new life, not only does he want to be an assassin in the dark, he also wants to stand openly in the middle of the world stage. Creating a world-class super enterprise, he will single handy change the whole world!

- Description from Novelupdates

Cho Kang-hyuk, the owner of a large fitness center, woke up to find himself a young disciple at Shaolin Temple.

Sinan Ke is a young talented writer of small, very dark *beep* novels. He is a gold medal author on a famous meat* novels website and he has a multitude of fans. However, he is still, after all, a wretched writer who puts the main character in his stories through great torment; so on this day, he got his retribution…

System: Welcome, Visitor No. 039, to the virtual punishment worlds of the Great Harmony Department. You are in scene XY0358, your current status is a student currently taking an exam—

Student Sinan Ke: What? ! ! (⊙?⊙)

System: Please save the various youths who have lost their way, otherwise, you will not be able to break away from the virtual punishment world.

This is the story of a small author of small *beep* novels being punished to go through various small *beep* worlds. He was tasked to save the protagonist who, because of said author, was turned into an obscene *beep* toilet.

- Description from Novelupdates