The Genius of Cloning in the Academy City - Chapter 97: Violet Gained in the Jungle

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 girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

In the City of Crime, one law stands above them all: Only the strongest can live.

Ye Qing transmigrated into a novel. She was only an unimportant character in the novel, and she was free to live a wonderful life by herself.

But, her happiness was short-lived. One day, an adorable girl that looked around three-year-old popped up and called out in a milky voice, “Mom.”

Ye Qing: ???

On another day, a cute and handsome twenty-something guy hugged her. With tears in his eyes, he said in a voice that was full of affection, “Mom!”

Ye Qing: ???

After Ye Qing had somehow inexplicably become the mother of two children, she discovered –

Neither of these children were human!

***

One day, a little girl pulled a certain big boss to the side to whisper, “Dad, mom was patting my head when she was telling me a bedtime story. I felt too comfortable, and I accidently swung my tail out. Mom seems to have seen my tail. What should I do? QAQ.”

- Description from Novelupdates