Born Into Villain's Family: I Have a 200\% Rebate System - Chapter 4 - : Not Real?

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.

Katherine Zara, a single middle aged office worker, went about her day as she always had; wake up, go to work, come home and read or play games. However, today would be different. Before she left for work, her ex broke into her apartment and killed her.

When she woke up, she was given many choices. She could pick her new world, pick her starting point, and pick her system among many other things. And so Katherine decided to become a servant to a villainess.

Follow Katherine as she serves her petty, demanding mistress in a world of swords and magic.

Additional: The Female Lead (Katherine) will be submissive to her mistress, but will be cold towards others. I plan on having some action, but mainly this will be a story about Katherine serving her mistress and leveling up her system.

He married the daughter of the Lancaster family purely for revenge. He expected her to be obedient and submissive, not to resist or show emotions—a perfect pawn in his plan for vengeance.However, when his gaze locked onto the third daughter of the Lancaster family, the one who barged into the living room was her—disheveled and stained with blood. She seemed ordinary, but beneath the surface, she hid an unknown sharpness.“Do you love me?” he asked coldly.“You're crazy!” she rolled her eyes in disdain.In that moment, he smiled with satisfaction, believing he had everything under control.But she fought back. Marrying him was merely one step in her own plan.Four years later, with the Lancaster family completely destroyed, she threw the divorce papers in his face, smiling like the final victor:“Albert Wilson, have you finished using me? Thank you for making me think I once loved you. Now, never see me again, even in death.”Just as she turned to leave in triumph, she accidentally walked into a gang's arms deal, and an explosion forever separated her from him.It was only when he found the two-month pregnancy test result among her belongings that he realized he had lost the only salvation of his life.

A face is a face, a song is a song, a composition is a composition.

Beautiful, talented and hardworking upcoming idol Sun Woojoo.

One day, a miracle came to him!

“I’ll become a star who shines more than anyone else.”

His dreadful dancing wasn’t an issue anymore.

At last, an idol with everything prepared.

Now, a monster rookie has appeared in the entertainment world!

In this life, the greatest star in the universe!