Zombie Apocalypse: Creation - Chapter 40: Wedding ceremony (R-18)

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.

A boy wakes up with omnitrix as a X-GENE

“I’m just a normal person who also has personal storage power.”When the next-gen VR game, Second World, finally arrived, the MC took a bottle of water out of his personal storage and took a sip before he was stunned.“T-this is inside the game, right?”From that day onward, he could bring in-game items out into the real world and vice versa. His life was completely changed.