MTL - Harry Potter’s Book of Sin - Chapter 362 What is a friend?

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 world where waves of monsters descend every night...A world where only the strong can survive.Axel, a burned-out man from modern Earth, wakes up in a desolate wasteland with nothing but a strange “Harem Settlement System” with him.Given the power to build, command, and grow stronger, he sets off to carve out a safe haven in this broken world. But as his settlement grows, so does the number of beautiful and deadly women drawn under his blanket-ahem!-banner.Witness Axel's journey, rising to to the peak. From a simple, lone survivor to becoming the Wasteland Overlord. With the help of the loyal, dangerous, and irresistible thirsty harem girls!

[sexual content and lemons warning]Warning: Sexual content, lemons, Comedy, MILFs, Genius Mc and his harem.Support the novel by adding to your library and with power stones!!*****Freshly turned eighteen, John Newman, a helpless nerd, suddenly gets video game abilities granted to him. A mysterious higher power, a secret Abyss of magic beneath the surface of the normal world, mages, martial artists, eroticism, tragedy and a harem of hot girls awaits.

Chu Jiao had always suffered from the quick changing nature of human relationships since little and had never tasted the feeling of being doted on. She was suddenly informed that her existence was only a few strokes of a pen in a novel. All her suffering was set by the author in order to make the male and female leads succeed.

She wasn’t willing nor could she accept the truth.

For vengeance, she bound herself to the “Supporting Female Carnal Desire System”. In order to survive and go back to the original world, she needed to kick down the female lead and take on the mission of catching the male lead and to clear the conditions, she needed——bo-body fluids?

Originally, she only planned to use her body without the intention of losing her heart but she never imagined that she would over and over again meet people that would carefully place her in the palm of their hand and spoiled her dearly.

They paid her with sincerity so she might as well return it with deep feelings.

Ultimately, she discovered that everything was actually love.

As the stars move and the time turns, you’ll like me no matter what I look like.