Rewind System: Vampire Harem In The Apocalypse - 63 Chapter 63

Traveling into the world of Genshin Impact—and of all places, ending up in Snezhnaya, which hasn’t even been released yet.A catastrophic start… but luckily, he received the gaze of an Aeon.With a single punch, he shattered a Fatui Debt Collector.With three punches, he brought down the Captain.As the knight’s helmet in the Captain’s hand crunched beneath Su Ran’s palm—The voice of the Tsaritsa rang out in sorrow:“Please… spare him.”Su Ran smirked. “Beg me?”The Tsaritsa whispered, “I beg you… please, spare him.”Looking up at the familiar figure upon the throne, he finally loosened his grip.~-------visit my pa treon for 30+ advanced chapters:pat reon .com/YonkoSlayer

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.

It’s been a year since everyone’s beloved heroine was possessed by a jealous villainess. I was tired of dealing with the male leads who came to tell me not to bother the heroine, and the angel-type heroine, who was completely oblivious to her. All human relationships are useless.“No matter what happens to the original story, I plan to live with cats for the rest of my life and then die of old age.”So, I decided to stay at home. The so-called Emperor Self Imprisonment.You have so much money, why do you leave?In order to live a comfortable life in confinement, they spend a lot of money making tape recorders and gramophone magic tools, but something is strange. The wizard who makes magic tools is too handsome for an extra.“… “It’s strange that I don’t see you.”“I was wrong.”In the meantime, the original male leads make a strange mistake and are in trouble.Please let me just be a homebody.

Aomori, who has a monster-fighting system, came to the world of One-Punch Man and gained the ability to enter various instances.

Therefore, “Founder of the Hero Association”, “NO. “And other titles fell on him one after another.

Comprehensive flow, the main world One Punch Man.

Completed dungeons so far: Pokémon – Demon Slayer – Sword – Pokémon – Digimon – Spell Return – Yokai Comprehensive World (Girls that Noragami Inuyasha can see, etc.) – Pokémon – One Piece-re0-Dragon Ball wait.

- Description from novelbuddy