Never Marry a Man With Two Tintins - Chapter 49.1

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.

After his death, Aoi Hiroto is reincarnated as a beast-like race, similar to Ghislaine's race, but with the memories of his past life intact. Now, torn between his animal instincts and human rationality, he tries to find his place in this new world. While Rudeus continues his journey, the protagonist forms new connections and learns more about this new world.Warnings:- The MC is like Rudeus, he doesn't know the world of Mushoku Tensei, for him, this is a new world with magic and swords, but he has seen other known animes.- Rudeus will still exist in this timeline, but the chapters that will show his point of view will be very rare, unless he is interacting with the MC.-The confirmed members of the harem so far is only Ghislaine.I do not own the cover image or any characters or references taken from the work Mushoku Tensei.English is not my first language, but I will try my best not to make mistakes.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

Julietta, born as an illegitimate child of a nobility, is raised in an opera theatre to hide away from the eyes of the noble’s main wife.