Akuyaku Reijou ni Nanka Narimasen. Watashi wa『Futsuu』no Koushaku Reijou desu! - Chapter 183.2: East and gold.

Going for a swim, she ends up in an ancient wild Beast World and ends up being brought home by a handsome wolf.
She wants to stick to the handsome wolf, stock some salt, farm some land, look at some handsome men and grow old like that, but the handsome wolf pounces on her every day.
What? He wants her to have babies?
NO~ NO~ NO~ There is no happy ending to interspecies marriages, hurry and let go of me handsome wolf~

- Description from Novelupdates

This is the story of a crazy lich who possesses an internal game system and brings catastrophe to the entire world.

“I'm on the hunt for someone special, someone who would howl at the full moon with me. And you, my dear, seem to check all the right boxes,” Thorin tried to seduce Riona with his mesmerizing gaze.“Not in this lifetime, not in any lifetime.” But Riona couldn’t stand the sight of that smug face. What did Thorin hope to gain from a fangless vampire who couldn’t even turn into a bat, anyway? There must be something seriously wrong with the brain of that infuriating Alpha werewolf.***Since their parents died, Riona Kahler and her brother have been adopted by the King of Eira, who treats them more like overworked houseplants than a cherished family. As the only vampires in Eira without fangs, they're outcasts among their own kind, toothless and ridiculed. Riona's spirit remains unbroken until her brother falls ill due to the palace's cruelty. Determined to protect him, Riona vows to escape, but there's only one way to do that.Thorin Klein is one of the most famous Alpha werewolves, renowned not only for his charming looks but also for claiming the Alpha title at the tender age of thirteen. Despite his howling success, his mother’s powerful werewolf clan, the Klein, never acknowledged him because his father went rogue. Determined to prove his worth to the Klein clan, Thorin believes he has finally found a potential solution.Though Riona couldn’t stand being around Thorin for more than one second, Riona realizes that marriage is their only path to achieving their goals. It's a love story that bites and barks in all the right places.#werewolf #Alpha #vampire #fromslavetoqueen #enemiestolovers #strongFL #contractmarriage

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.