MTL - Congratulations, Empress - ~ 125 The wind has not come out, the name of the world is three or five

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.

“Ah, Young Master, Cassius?...I'm afraid you'll be dissapointed to hear that he's not available at the moment as he's 'attending' to his adopted mother in her room.”Cassius's lovely maid, Isabelle said in a fluster while she heard lewd sounds escape from her Mistress's room.“No, I'm sorry to say that you can't meet Young Master today, since he's 'helping out' his sister-in-law with some 'favours' in her garden.” The innocent Isabelle excused herself as she witnessed her lady's flower being picked, instead of the rest of the flowers in the garden.“I hate to say this sir but Young Master, Cassius is currently guiding Miss Knight in the 'ways of the sword', so you can probably only meet him tomorrow.” Isabelle once again blocked the guests from entering, knowing that the sword her Young Master was handling could penetrate a body, but could never wound one.“I apologise once again as Young Master is at the Capital right now teaching a class to the female students in the Academy.” Isabelle said with her cheeks flushed, already knowing that her master was taking a very 'practical' lesson about human reproduction with the girls in his class.“Oh my! The King wants to meet the Young Master?...Well I guess he'll have to wait since Young Master, Cassius has gone clothes shopping with the Queen.” Isabelle lied to the King himself, knowing that her Young Master wasn't shopping for clothes and was actually removing the royal clothes off the Mother of the Country.Excuses...Excuses...The loyal maid, Isabelle had no choice but to make excuses for her Young Master, who was the most talked about and hated noble on the Continent because of his depraved escapades with all sorts of woman ranging from his own Family to Royalty itself and his Tyranical rule over his estate.And to think that not too long ago he was considered a wastrel noble, who was going to drink himself to death one day....When did it all begin she wondered as she excitedly walked into his room to get the reward she deserved for being such a loyal made, while someone else made excuses for her this time.•°•°•°•°•°•°•°•°•°•°•°•°•[No NTR - No Yuri - No sharing - No system that assists the protagonist - No mind control - No drugs or potions that influence the girls - No unnecessary Drama - Incest - Harem - Hardcore Netori - Slice of Life Romance - Demigirls - Elves - Vampires - Beast Girls - Slaves - Royalty - Finally a very competent protagonist]

I was walking to the convenience store and the next moment I knew, I was inside the villain's body!?What is going on!?This world is known as the world of Star Fantasy, a popular RPG that dominated the gaming charts. Tournaments were held all over the world to celebrate the success of this game.The top ten guilds were invited for every tournament to recruit new talent for their teams. Liam was part of the third strongest guild in Star Fantasy. He suddenly woke up as the son of one of the strongest knights in the empire.Arnold von Berkley, who will become one of the greatest villains in the story.He must find out if there are more of him out there. Was he the only one summoned? If so, how can he avoid his inevitable death? By eliminating his death flags!

[Hottest Blood-Boiling Thriller]The Divine Level Expert from the apocalypse is reborn in the city. He intended to live a low-key, restrained life, but women broke off engagements with him, his family abandoned him, and everyone looked down on him…“I was low-key, but you forced me to be arrogant. Since it's come to this, then let Heaven be in awe, let the earth tremble, let the whole world go crazy because of me!” —Ye Tianchen.