MTL - Transmigration: The Life Winner’s Ex-Girlfriend - Chapter 104 the little sun

After dying, you wake up and realize you've been reincarnated as a background character who is judged as human trash.The decision to change your destiny comes instantly.Discovering that your identity isn't as simple as you thought, you feel favored by the heavens when you manage to become a powerful character.Katase: You won't fool me. I'll expose you for the pervert you are.Murayama: ...Thank you for saving us.Issei: Motohama, what happened to you? How are you so powerful?Rias: If you join my peerage, I wouldn't mind being yours.Sona: You beat me in the game. That means you're now my fiancé.Yasaka: Honey, Kuno wants a little brother.Kaori Houjou: Shinji-kun, let's go on an adventure.Kaede Kazama: Shinji-kun, thank you for saving me from that ball.Rie Sawada: Shinji-kun, I'll wait for you. You'll be my future husband, fufufufu...Changing known history and taking it in a direction not even his eyes could perceive, he didn't stop no matter what. Not even the other world was safe from his clutches.Lexia Von Arselia: My hero, and my future husband...Shinji advances without stopping.“I, Shinji Motohama, swear here and now that I will reach the top of both worlds.”

I became a wizard of the Illusion Magic School and decided to create a virtual reality with illusion magic to play a tabletop role-playing game (TRPG).It was great to create a virtual reality, but I was in trouble because there were no suitable players. During that time, I received an offer to be the professor from the Royal Academy.The offer was to use illusion magic to fill the students’ lack of practical experience safely. And so, I became a professor at the academy.“Send me back, send me back to that world right now-!”“Outer god, someday an outer god will be our doom, we’ll all die!!”“I am not the bastard of the Redburn Ducal Family. I am the foremost disciple of the Great Namgung Clan, Namgung Qinghui!”But it seems there is a bit of a misunderstanding.This isn’t a spell for dimensional travel, kids. It’s fiction…

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 the depths of the underground world lived the descendants who were born and raised by feeding on the teats of beasts.

These individuals with special abilities and enhanced physical abilities were known as dungeon babies.

Amongst them, Kim Jin-Woo was born in the labyrinth on the lowest floor.

“I’ve never tried to become strong. I just wanted to survive.”

This is a story of a lowly tunnel digger who ascends the throne to become the king of a labyrinth.