MTL - The Rebirth of the National Goddess - Chapter 834 845, it is impossible (two more)

Liu Yuan is a good game player, especially in the MMORPG Upper Center. Just as he succeeded in gaining the favorability of all the possible characters in Upper Center, he transmigrated. To where? Oops, he transmigrated into the game he was playing.What he saw was a pretty girl. She wept incessantly, failing to notice Liu Yuan’s unusual behavior. She looked up with teary eyes and said in a firm way, “Mr. Junxuan, I will not marry him. I wish to be with you for the rest of my life!” Junxuan… Wasn’t that his username in the game?

Kurono Maou is a high school student who is sensitive of his sharp eyes and bad expression. No girlfriend but gifted with friends in his own way, he had been living a peaceful life.

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.

The middle boss of the AAA-class game produced by the company. The villain who dies 999 times out of 1,000 times. Deculein.That person, was me now.“You’re going to die on almost every route.”Deculein, like all villains, inevitably dies.[First and foremost survival goal: Be what the game requires you to be]I’ll have to survive even if it means twisting my fate if I am destined to die.