Pokemon : Rewind - Chapter 368 - 50: Rudy

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

A cultivation technique that is regarded as rubbish, and a cultivator who is regarded as a waste by the same school, after receiving a yin and yang jade pendant, everything will be completely changed.

Ten times the training speed, Gu Fei repeatedly broke through the limits of martial arts. The iron law that had been recognized for thousands of years was broken by Gu Fei one by one!

Miracles… Gu Fei doesn’t believe in miracles. He only believes in blood and sweat. In this martial art has fallen, the true meaning of martial art has been lost in the training world of Tenglong Continent. , Fighting demons and ghosts, embrace stunning beauty, and achieve indestructible Wu Zun!

- Description from MTL

The moment Kazuma arrived in the world of Jujutsu Kaisen, a cursed spirit knocked on his door, making him panic.Fortunately, he awakened the mission selection system.[Mission Option 1: Look into Gojo Satoru's eyes for ten seconds.Reward: Mangekyo Sharingan][Mission Option 2: Change Mei Mei's hairstyle to twin ponytails and have an in-depth communication with her~Reward: Tsukuyomi!]During the Shibuya Incident, Sukuna went crazy.Chibaku Tensei, Infinite Tsukuyomi, Susanoo...Yuji: “I thought that Gojo-sensei was already invincible. I didn't expect Kazuma to be even stronger than him.”Since he had arrived in this world, Kazuma vowed to make a happy ending.Gojo becoming Go/jo? That won't happen in his presence.Yuki, Nanami, Mai, Junpei...?He's going to save all of them.***This is just a translation. All credit goes to the original writers.Raw: 咒回：人生选择，开局万花筒！

This world is not reality, nor am I the protagonist.