QT: I hijacked a harem system and now I'm ruining every plot(GL) - Chapter 21: Jealousy

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.

CautionTaboo 18+Banished by failure and despair, a virgin loser wakes in a new world with a forbidden power—the Lust System. To survive and claim a rare herb that could save him, he must seduce, corrupt, and conquer hearts across worlds. Pleasure is the key to power…and survival.

When Allen Zhang opened my eyes, he found himself on the free air of the West Coast.He became a city explorer.He started off with no dog, no identity, not even a tent.Fortunately, he gained a daily intelligence system and made many like-minded friends.[Daily Intelligence: At the club on 134 Hopson Street, there are a large number of recyclable cans and clear beverage bottles in the green trash bin in the alley.][Daily Intelligence: In the red trash can on 96 Eito Street, there are unfinished burgers and 7 fresh flowers, as well as an unopened bottle of Pinot Noir red wine.][Daily Intelligence: Your good neighbor Jesse has a scratch-off lottery ticket worth $5000 in their tent!][Daily Intelligence: Mike's junkyard is selling a 1976 GMC camper van that has been parked in the suburbs for twenty years for a low price of $200. Details: At the Old Pick Garage, there is someone who can fix it.]Fxxk!! Life has turned into a ridiculous scavenger game.Allen Zhang decides to start leveling up from the streets of the novice village, striving for a better tomorrow.

After an accidental death, in order to continue to live, Gu Bai had to choose to go through various wonderful books to complete tasks.

Every time he became a variety of small cannon fodder inside the story, Gu Bai’s code of conduct when completing task is – by all means, don’t be inferior, don’t be shameless, don’t be upright… hold on to a golden thigh.

… N times after transmigrating

Cannon fodder: (angry contempt) … You’re already so powerful, why are you still shamelessly holding on to a golden thigh to deal with us!?

Gu Bai: (deadpan) That… holding and holding… got used to it…