Breaking Free: Love & Rebellion at Blackthorn Academy. - Chapter 51: PREFECT.

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.

Once upon a time, an Alchemist Grandmaster from the World of Immortals accidentally took possession of a playboy, who hailed from a rich and powerful family, and became a student in the middle of his midterms.

By the means of a miraculous immortal technique, he blended in and mingled amongst the femme fatales’ group to dominate the city! The nature of this novel’s origin is shamelessness to the core; having no sense of shame is just a basic foundation, but if the most shameless isn’t set yet, then become it!

- Description from Novelupdates

When Simon dies, it turns out there's more to combat than lightning reflexes with his controller, and the path to becoming a hero is more brutal than he can imagine as he descends into The Pit. Death after Death is a dark, time loop/Isesaki story with roguelike elements, that explores some of the common tropes in a different light.

When it comes to chasing a male god, who does it best? Please come to City C and find Miss Morris.When Ariel Morris was young, she chased after Jimmy Season, the top male idol at Scenic Hill High School, and secured her place as the number one on the female-chasing-male leaderboard, a record yet unbroken.Time passed, and eight years later, upon meeting her male god again, Ariel Morris once more embarked on her long journey of pursuit.After marriage, there was an interview by reporters with the sweet and loving couple.“May I ask, who chased whom?”Ariel Morris laughed charmingly, “Of course… I chased him!”The crowd was shocked!Young Master Seys lightly smiled, “Sometimes, chasing someone doesn't necessarily require hands-on effort, just a little brainwork. And clearly, my wife's IQ is lacking, and her emotional intelligence is zero.”Miss Morris: “……”So, in this emotional pursuit, who really chased whom? And who first had feelings?……—Many years later, does the person you love still love you?—It turns out, what is constantly on your mind will indeed have a response!Arlo Seys & Ariel Morris: Serenity Time, Seasonal.May the wind dye white frost, and may Seasonal never fade away Ariel!