It's Actually Not Easy Wanting to be a Supporting Male Lead - Chapter 2.9

Fanatic virtual gamers:
Tired of the stereotyped linear drama emotions? Want to try a real open world game?
Are you tired of playing an RPG that can only play a role? Want to lead the subordinates in virtual reality and experience the thrill of governing the army?
Welcome to the massive open killing game “War in Heaven”.
……
Seeing the game’s winning and losing judgment mechanism, a professional player who is interested in PVP for 20 years and is also very interested in AI, has a bright smile:
“It’s time to show the real killing method… How about building an AI army by the way?”

- Description from Uukanshu translation

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.

Fate had never been kind to Ji Ning. Wracked by illnesses and infirm his entire life on Earth, Ji Ning knew early on that he would die as a teenager. What he didn’t know was that there really was such a thing as life after death and that the multiverse was a far larger place than he thought.

A lucky twist of fate meant that Ji Ning was reborn into a world of Immortals and monsters, of Ki Refiners and powerful Fiendgods, a world where Dynasties lasted for millions of years. A world which is both greater… and yet also smaller… than he ever could imagine. He would have the opportunity to join them, and in this life, Ji Ning swore to himself, he would never let himself be weak again! The Era he was born into was a Desolate one, but Ji Ning would make it his era.

When Yohan woke up in the morning, he had a beauty in his lap and in his bedroom. It was like a dream come true for him until reality struck him.

It was then he remembered that he had been cursed by a goddess in the game he had been playing before sleeping. In his sleep-deprived state, he had offended the goddess and as a result, he had been cursed to become a 'no-good' man who could only provide 'support' to the 'heroines' of this world.

Thinking nothing of that curse beforehand, Yohan went to sleep, only to find his world-changing from that day onwards. His normal and mundane life was no longer going to be as such as more and more fantasy creatures began to show up.

And a female voice awoke him with a notification

*Ding dong ding.

Congrats on unlocking the fiction system. From here on, the user will experience the full scope of the logic of the fiction world. May the user use his PP and conquer everyone.*

And it was then Yohan realized - he was no longer in a world governed by science but one that followed the laws of magic. And the only way to survive was to utilize these so-called 'laws of fiction' to his advantage.

And the best and worst part of it all? The more he let his desire go, the stronger he became.