Ant Lord in the Star Realm - Chapter 665 - 578: Guidance from the Linnan Divine Tree: The Way of Divine Marks_3

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.

A little ruffian who fought recklessly without any morals and bottomline accidentally time-traveled to parallel space and became a Key Case Investigation Team agent. The huge change in identity had him creating chaos in the police station. However, a strange miracle system helped him repeatedly solve mysterious cases, turning him into an impudent ruffian detective!

[IT'S NETORI, not the disgusting Netorare]COUGH Since our lazy author-nim is a bit... let's say, challenged in the synopsis-writing department, I'm stepping in. Sigh... now he's making me do his job too... X(Let's hope he can at least complete my story.Anyway, I'm Lucian, a 35-year-old guy with a rare disease that's cutting my time short. But here I am, working till my last breath sigh.*KNOCK*Oh, a guest! Gotta be quick—can't keep a lady waiting. So, after I kicked the bucket, I woke up in a body that kinda looked like mine but not really. Turns out, I'm on a flipped planet ruled by women. And guess what? I'm married to a cold and crazy ya#SPOILER#. My new mom? Total #SPOILER#. Then I *CENSORED* her right in *BEEP* of my new dad.To get stronger, I need to travel to #SPOILER#. Instead of a cool system, I got a useless b... *BANG* (gunshot).Due to health related issues, Lucian will be taking off, and the author will continue from here...“Kyaaa!! The patient died from a gunshot!”Don’t worry, Doc. He was on borrowed time anyway. So, let’s talk about what this story has.“B-But, he still had a few months to—”*BANG*So, here's what you can expect: Revenge, mystery, a bit of comedy, an overpowered MC (maybe), all the deredere, milfs a lot of them, wince... *COUGH*, hacking, a hero, a villain, manipulation, crime and a lot more.What you won’t find here: NTR, Yuri, a girlfriend, a job?, etc.Now, the serious stuff. This story aims to keep things light and happy but will have its fair share of sad and rage moments. Alright, that's it for now; I need to go, or we might actually lose our MC before the story even starts...For those who prefer to keep things PG, feel free to skip the R-18 chapters. We understand, really! And for those who pride themselves on being ‘Men of Culture,’ get ready to savor the spice. Bon appétit!

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

- Description from Novelupdates