My Girlfriends Are Hardcore Yanderes - Chapter 19: Logical Student Part 2

Arthur Grail, a hardcore player of the VRMMO Trinity Star Online, woke up one day in the body of Gerard Astoria—a petty villain fated to die before the main story even began. To make matters worse, Gerard's death was a crucial event in the game's narrative. If he didn’t meet his predetermined end, it could disrupt the story entirely, leading the universe toward one of the countless “bad end” routes!Unwilling to leave his fate to chance, Arthur decided to take matters into his own hands—recruiting the “player” as his partner to help him clear the game and rewrite his destiny.But wait—“Why is the player not a dude but a sharp-tongued beauty instead?!”Follow Arthur's odyssey, filled with trouble at every turn, as he works to uncover the mystery behind his awakening in a universe eerily similar to Trinity Star Online's setting, all while trying to save the entire universe… without forgetting to enjoy himself!

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.

She was once an heiress, but later her family went bankrupt, and her fiancé betrayed her. Besides, she had to bear the expensive medical expenses of her brother. Therefore, to regain everything, she decidedly married her ex's cousin in a deal. Initially, he was very aloof and didn't care about women at all, but he gradually fell in love with her, protecting her and supporting her...

Betrayed by his own werewolf clan and left to die in a forbidden vampire crypt, Lucien Drake awakens something ancient—something monstrous.His blood ignites the Crimson System, binding him to a long-lost vampire bloodline rumored to be more powerful than the vampire lords and deadlier than any alpha.Now reborn as a hybrid of vampire and werewolf, Lucien gains powers no being should wield. The System whispers, hungers, and rewards him for one thing: domination—of bloodlines, enemies, and women.With every kill, he evolves. With every seduction, his power multiplies. And with every conquest, the world bends closer to its knees.But ancient forces stir. Vampire princesses, werewolf queens, and dark priestesses all want him… dead, bound, or in their bed.In a world where the strong rule by blood, Lucien is rewriting the laws of nature—and he'll either claim the throne of night...Or drown the world in crimson fire.> “You think I'm a monster? You haven't even seen what I become when I climax with your queen.”