Escape from the evil lady (GL) - Chapter 145 - 6. Personal Assistant

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.

Awakening to a post-apocalyptic world infested with zombies and mutated monsters, Alex makes a startling discovery: he possesses a system that grants him access to unlimited resources every day.【Congratulations, you've received unlimited bottled water.】【Congratulations, you've received unlimited 9mm bullets.】【Congratulations, you've received unlimited cold medicine.】...With each system notification, Alex's chances of survival soar while others struggle to stay alive.As everyone else fights for their lives, Alex finds himself living in luxury, residing in a lavish mansion where he leisurely sips red wine and savors grilled delicacies amidst the chaos of the end times...

Western VRMMO【DEMONDAL】was known for its extremely harsh game system. To begin with, there were no levels. There were no skills. There were no guilds. There was no inventory. There were no convenient system messages or maps of any kind either. It was so needlessly realistic that it was already basically a VR life simulator.

As for anything game-like, it was basically limited to weapon masteries; a proficiency level that you got from using your weapon, as well as physical strength that increased as well. That was it.

It was a fantasy game so there was magic, but forming a contract with a spirit was extremely difficult, and only 1% of the playerbase were magicians.

In this VR game【DEMONDAL】that was ridiculously close to reality, the protagonist Kei who was a well known mounted archery expert, was one day sent to another world with his Russian【DEMONDAL】friend.

The game that was severe to begin with had turned into a reality, and the harshness increased again――

Our straight (?) bottom woke up ten years into the future and found himself on the bed of his childhood friend… At the start, the bottom was shocked to his very bones, but he soon quickly accepted this premise and found the whole situation to be rather amusing. Precisely then, the bottom once again went back to his timeline — back to when he and the top were just platonic childhood friends.

Landmines include but are not limited to: Sweet & naive bottom, a president story, logic is dead, slow-progressing romance, the protagonist’s name has too many character strokes, the names are hard to pronounce, too many gay characters…

- Description from novelupdates