I've Never Seen a Saint who can use Magic so Well - Chapter 4

In my previous life, I was a pawn, highlighting Henry Preston's deep affection for another woman, ultimately leading to a tragic end with a broken family and a desolate fate.After being reborn, I found that letting go and doing nothing felt the most comfortable, so I decided not to intervene and just wait for Henry Preston to propose a divorce.But the situation developed a bit strangely; the man who was never home in the past life started coming back frequently. He also seemed worried that I might cheat on him.“Do you believe that in the near future, you'll be eager for me to disappear?” I asked.“Stop dreaming,” he replied. “We'll torment each other to death.”I sighed, confident in my knowledge as someone reborn, that Henry Preston would soon meet his true love.Finally, he and she met, and I thought my freedom was just a step away.However, he quietly asked back, “Who said I was going to divorce?”Not only did he refuse to divorce, but he also started paying more and more attention to me, even abandoning his true love!

He went from an ordinary student to a god-level master in manufacturing.
Continuously progressing, processing range from hundreds of meters to tens of atoms, processing precision from microns to nanometers to atoms and molecules, everything was possible.
Wassenaar Accord? The embargo against China? What we have banned are technologies that China doesn’t care much about. Most of the member states have to import technology from China, shouldn’t the member states have a meeting to discuss and bring in China as well?
Forbidden chip sales? Is there a mistake? We barely managed to maintain our low-end market with a large amount of subsidies, it’s already good enough that China didn’t initiate an anti-dumping investigation. President, are you sick?
Hmm, it seems like living cells can be processed precisely as well. Do you need to refine the cancer cells that you are spreading out?

- Description from Novelupdates

Kawaki, who was born in the dragon vein of a planet (Altana), first met Umibozu who was traveling in the universe, and his girlfriend, Kouka.Later, he came to Earth by accident and met the teacher who affected his life —Yoshida Shouyou.He also met a group of friends. The most conspicuous among the group of friends is a fool with silver hair and naturally curly hair, a short man with purple hair, and a little devil whose catchphrase is “Not Zura, it's Katsura!”Gintama Doujin, not transmigration.

An unexpected journey took a group of university students into a secret room from which, upon returning, they began to disappear one by one. In order to unravel the mystery, they joined forces, traversing heaven and earth, diving deep into seas, crossing the farthest corners of the world, and even daring to time travel, only to find that behind each puzzle lay yet another.