Akame ga Kill: Starting with Dual Kamui - Chapter 126: Great General Budo

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.

In this world, there are those that are fortunate and those who are not.

Ethan Bellrose is neither; he is cursed. At nineteen, he has lived his entire life sheltered in his home as his fragile body blisters under sunlight, breaks under the slightest impact, and falls to any sickness.

However, the arrival of a world-changing digital service catches the hopeless young man’s eye: “Reincarnation Online”--a virtual reality experience that gives a new fantastical life to those who are unfulfilled with their current path.

For Ethan Bellrose, the choice is simple. Without hesitation, he orders the virtual reality headgear, choosing to abandon his current life and live forevermore in the world of fantasy, magic, and endless adventure–”Arcadius.”

Though what he finds is a world not full of leisure and trivial triumph, but a world just as alive and full of darkness, glory, and grandeur as Earth–if not greater.

Starting from square one as an infant, given a new name and family, this is the eventful life, full of dreadful lows and exhilarating highs, of “Emilio Dragonheart.”

[...Booting System…]

[Welcome to Reincarnation Online.]

[You will henceforth by the recipient of the Dragonheart System.]

[Please, enjoy your stay.]

[Unconventional routine text! The content is seriously inconsistent with the title of the book, and it is biased towards the daily direction and life flow! If you don’t like it, don’t enter! 】

Through the strange but familiar parallel world, from a popular writer to a high school student lying on an orthopedic hospital bed:

There is a sweet voice in my mind that keeps repeating endlessly;

In the school, there was a deskmate who was said to have nothing but good looks;

…

In the previous life, he lost to reality in the long-distance love race, and was alone for half his life. In this life, he wants to try to be a scumbag.

Is there a more suitable career than a star?

Novels, poems, music, movies…

It all starts here.

- Description from novelbuddy

MATURE CONTENT. DARK FANTASY ROMANCE.Kaya is more than just a wolfless omega; due to her unique appearance, her fate is far from the usual cliché.After enduring years of relentless bullying and abuse from her packmates, she clings to the one glimmer of hope in her bleak existence: her mate. The Alpha of her pack. The man she trusts above all else. But to his Luna, Kaya's very existence is unbearable.Naïve and devoted, Kaya never questions her Alpha’s intentions, until the day her world shatters. Sold off to an allied pack, she is taken by rogues on her way to her new “home.” With no wolf and no hope of rescue, she prepares for the worst.But fate has other plans.In the midst of her despair, something impossible happens—she shifts for the first time. And in that moment, she comes face-to-face with her true mate: Alpha Magnus, the ruthless leader of the most feared pack under the Lycan King’s command.Thrust into a life of power and danger, Kaya must navigate a world she was never meant to be part of. But shifting was just the beginning—her trials are far from over.Please note that this novel is intended for a mature audience only. Some chapters contain depictions of violence and abuse, so read at your own discretion.