Mr. Qin, Your Mute Wife is a Full-Level Bigshot - Chapter 24: Sooner or Later, I’ll Be His Wife

A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life. This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students.

What does it feel like to find yourself inside the novel of an author you hated? How will you survive in a world that's filled with cliché? Well, something similar happened here.

Once there was an unpopular fantasy novel author. His life was pretty messed up—no, he made it messed up. And remember I said messed up, not sad.

Due to certain reasons, he ended up never having the life that an average teenage boy should have.

But soon he was freed from that life as he died due to a lovey-dovey couple. He was freed but he had regrets…after all, he didn’t make his life that way because he wanted to.

The things he did were the result of his condition and impulses.

It seems luck was on his side at that moment, seconds after he closed his eyes and died, those eyes opened again but this time they were gazing at a world different from his old one.

He got a second chance! Now he will live a new life, a life he wanted to live! This time he can live, grow old, and then die in a “normal” way! The way things should have happened in his former life.

Though it turns out he also had a good amount of bad luck on his side as well.

Later he found out that the world he reincarnated in was the same as the novel of an author he hated the most. The only person he never wanted to talk to again…he was reincarnated inside that very person’s novel.

This is his story! The story of the man who was known by the name “Zero” in his second life. The story of how he survived without plot armor in a world filled with cliché situations, only in the favor of the MC of that novel.

This is, Author’s Reincarnation in a Fantasy Setting!!

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

“If I don’t die… I swear I will act on all my evil thoughts..”

Not exactly everyone’s typical thought when they’re about to die. What will a cowardly young man do when reincarnated with the evil powers to redefine his destiny? Can the natural kindness of human nature triumph over evil? Will he become the cold-blooded demon king of legend, or will he forge his own path and rain down another kind of terror?

- Description from novelupdates