MTL - Horror Game Escape Guide - Chapter 122 Bloody Mary (6) Mirror House

As a walk-on, he had been the mistress of his sugar daddy for three year. However, they only had met each other for a few times.
As a boss, his sugar daddy had tons of lovers.
The walk-on: The cake shop is the only thing I love in this world. Lovers? Never want one.
The boss: No problem. Nobody wants that.
Then, they fell in love with each other…
Shameless playboy x heartless rogue
1v1, this is not a decent love novel.

- Description from Novelupdates

At a low point in his life, Xia Ruofei discovered that a scroll that was passed down in his family had a hidden secret: it contained its own independent world.

In the space, there was a spiritual pond that enhanced the growth of plants. There were mysterious spiritual flowers that could cure illnesses. Time in the independent world flowed at a pace ten times that of the outside world. Everything he planted there was of supreme grade and grew at a rapid pace. Everything he raised gained sentience.

From that day forth, Xia Ruofei began a different, brilliant life of planting succulent plants and vegetables, raising animals and flirting with beauties.

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.