I've Got A Mana Processor In A Magic World - Chapter 113: Crestwood’s Theory

In a world where mysticism and steam industry coexist, cursed objects, the Reception Bureau, and Evil God fanatics...That year, the King was bedridden with illness, the successor was inexperienced, and power slipped away, leaving the empire teetering.That year, external forces gathered around the empire, and foreign civilizations eyed it covetously.That year, the prophet delivered a prophecy that the era of civilization was nearing its end.That year, Ethan arrived at a small town on the outskirts of the imperial capital. To survive in this perilous era, he began practicing Fireball Skill.Years later, Ethan looked at the meteor falling from the clouds and realized there was a problem.The beginner Magic he learned seemed a bit off.

A 20-years old boy transmigrated into the female-dominated novel world, But not as a protagonist nor as the main villain.

He transmigrated as the green tea boyfriend of the main female CEO heroine and will become the first target of the protagonist of this novel. Alex was scared for his life. In the novel, it's impossible to defeat the son of luck.

When he was helpless, the golden finger exclusive for travelers came.

[Ding! The Female Raider System is being loaded.]

Alex was excited thinking that he doesn't need to go close to a high cold female CEO but the system tells him different things.

[Ding! As long as the host raids the heroines and increases their affection, the Host will receive heaven-defying rewards.]

So his journey as green tea/White lotus raiding began.

This stands at the forefront of strategy guides to Life (a shitty video game)!

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.