MTL - Deep Sea Survival: Start a Submarine (Deep Ocean Survival: A Submarine From The Start) - Chapter 186 traces of the future

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

Lin Li accidentally enters another world while playing with his smurf mage account just after he maxes out all kinds of crafting skills, bringing with him various top-grade materials. Although his character is practically powerless, what he gains in return is unprecedented magical talent! Can he survive by himself after being thrown into another world?

- Description from Novelupdates

“W-w-w-welcome to the simulation zone.”“New user recognized.”“Proceeding to register...”“Please wait...”“Register complete.”“Welcome, user number 4956: Evan Rotewed.”In a world of mana, those without reserves for it gets left behind. Rules and regulations are set to categorize everything into neat piles, each promising the highest potential a person with mana can get. Starting his life at the rock bottom, Evan Rotewed swore he will rise above it all, even if he had to break the ironclad system the entire world holds close to its chest. Wave a hand to the broken reflection beyond the mirror of ones and zeroes. System Discord.

One day, I was summoned to this world.