The Female Fox Spirit Gets Spoiled by the Big Shot - Chapter 5: Expose your soft belly and let him ravage you.

Demons? Monsters? It was a fox demon who came to his room and seduced him at night. A wedding to tie their fates together.Bai Yunzhi, the fox demon who fell in love with Su Bian. Su Bian helped her mother 25 years ago, and Bai Yunzhi repaid her family favor. She dual cultivates with Su Bian on her wedding night with twists and turns, thus tying the red rope of marriage to each other.

He was very happy to be reborn, but why was he sixteen again, he can’t bear to look back at that time.

Why does he return to being sixteen years old, yet still meet Doomsday?

It’s alright to encounter the end of the world, so why did he have to fall in love with someone?

Even if he falls in love with another person, why did it have to be a man?

Falling in love with a man is also alright, so why did it need to be a secret one-sided love?

Even a secret and unrequited love is alright, so why is that man his….

- Description from Novelupdates

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.

Omnipotent A-Grade Cool Female Lead VS Secret Passionate and Domineering Male Lead That Loves Assuming and is Easily Jealous