Surprise Marriage to a Billionaire - Chapter 344: Forever With

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.

prev name: In mha with jjk power.---------[mha synopsis]“Hero? Villian? It is all redundant.”“There is no such thing as good or bad, only interest is what matters.”Kurokai Sento said as he faced the inheritors of One For All and All For One standing against him with their fellow Heros and Villains.“Why? Why?! Just what is your motive?! Kurokai!”Kurokai smiled and replied calmly.“Motive? Of course, there is, unfortunately, none of you can understand.”--------------------------------It is a multiverse travel type of fanfic. The first world will, of course, be MHA(complete). Then Overlord(Ongoing), danmachi(ongoing)You can directly start reading from Overlord if you want, it won't affect the flow.---------------[Overlord synopsis]Lioro blankly looked at the game like screen in front of him.It seems he has traversed to Overlord world with a Yggdrasil like game template![Ding! Congratulations on getting the special profession 'Dimensional Traveler']“......”Can it take me home?

As a eunuch, Tian Qi’s ba zi* was harder than diamond-plated gold drill. Although her ba zi easily brought an end to three consecutive masters, the Emperor was not afraid to be the next casualty and got her to serve at Qian Qing Palace.

Although His Majesty looked like a handsome gentleman, his behavior was more like a hooligan. Once, the Emperor touched Tian Qi’s lower abdomen and started to wonder at the amazing flatness of the area…

*八字 a Feng Shui term that refers to one’s date and time of birth, or the destiny that one is born with

- Description from Novelupdates

Harem Dynast is the story of a princess set up in a political marriage with King Lorent, a great conqueror who is often mentioned in the Harem novels.