Skeleton Knight, in Another World - Chapter 15Volume 8 -

Ji Ling, who was transmigrated into the notorious body, after settling the foreign debts owed by the original owner, was persecuted by peach blossom debts before, and then had a mother who wanted to exchange her for money.

Suddenly, in order to repay her kindness, Ji Ling married her benefactor’s grandson, an elderly young man, in a flash marriage.

In the days after marriage, she summed it up in one sentence: My daily life with the face-blind old rooster.

Gan! !

- Description from novelbuddy

The Apocalypse descended as the world turned into a game. And while everyone panicked, I couldn’t help but wonder if there was something wrong with my eyes.[Logging into the Game Master’s Account!]And my ‘oh-so-average’ destiny, changed into ‘is this a cheat life?’ Kind of destiny.[Would you like to Create a Skill? GM Points will be consumed!]While others struggled to kill a single goblin, I was searching for stronger monsters. While they were happy with getting even a random weak skill, I was customizing what kind of skills I needed.Even my Talents and Gifts can be customised. The only limit was my imagination.Heck, even the hidden quests that people would trigger randomly were present in front of me even before the scenario began.It wasn’t fair by any means. But isn’t that how life is already?[Would you like to make changes to the quests in the next scenario? GM Points will be consumed!]Is this how an apocalypse is supposed to be? I don’t know. I just tried following the script in front of everyone while trying out my cheat in hindsight. Don't get me wrong with the ‘pig eating tiger’ kind of thing. I just don’t like attention. I would rather stay with two trusted friends than with 10 fake ones.[Would you like to Initiate a Custom quest for the Players? GM Points will be consumed!]And for the players who were bullying the ‘weak’ me. One may even wonder how they ended up losing half of their stats and skills in a randomly triggered impossible type of quest.Fate can be truly scary, you know?One must always be careful of it.

I have experienced all the eight sufferings of this world.

I do not ask for nirvana, but for you.

Wild and hard-to-tame demon (gong) x cold, ascetic and childish immortal (shou)

- 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.