Talent System In The Naruto Universe - Chapter 138. The Kind-Hearted Grandpa Uchiha Madara

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 old man pointed to the flower-like woman and said, “Call her mother from now on.” He then pointed to a flower-bud-like girl and said, “This is your sister.”

My younger sister was not cute.

She was arrogant, taciturn and weird, but she knew how to please our parents.

She was two-faced and deceitful, but it seemed like she only treated me that way.

I cared for her, tried to please her as much as I can, but she still disliked me.

Until one day, I found out her secret, our relationship began to get a little bit weird…

- Description from Novelupdates

When she stands, she’s like a white peony. When she sits, she’s like a tree peony. When she walks, she’s like a lily flower. And when you look her in the eyes, she’s like the Great King of Terror.

Despite having the qualities to be a peerless bishoujo, because of the look of her eyes and that atmosphere of hers, she’s feared by others; such a girl is forcefully sent to another world.

Being told that she would be granted a wish as a special favour, the girl made a wish────

“Make my eyes and atmosphere normal please.”

This is a story recounting the lifestyle in a parallel world of a girl who would be perfect (probably) if just her one weakpoint was overcome.

A fantasy comedy with magic, dungeons, and a hero and demon king(candidate) who she gets tangled up with.

In the future timeline, Humankind had developed things that brought a revolution to the world. But their best invention was fully immersive VR games that became more and more advanced as time passed. They could create new worlds— in virtual reality, that was more beautiful and profound than the real world they lived in.