Picking up Girls With My System - Chapter 407 Second Forbidden Eye

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.

This was the era that belonged to various powerful bloodline warriors, the fervorous era where magic powers and warrior energies were the deciding factor of dominance! With endless ardour and unstoppable courage, a grassroot nobody could also shine and live like a boss!

In the whole world there lays twelve paths to climb the Tower of God, and in legends these twelve pathways leads toward legendary road of immortality. However these paths in the Tower of God, are far too long, without end.

Lucien is an exploited employee, with a miserable salary and a life marked by loneliness... as well as carrying a secret that beats within him: the mysterious Black Blood.One night, on his way home, he is attacked by vampires. What seemed like the end becomes the beginning of an unexpected destiny.Lucien wakes up as a vampire... And not just any one.Amidst intrigue, power, and an unexpected marriage to beautiful vampires, he will be drawn into the dangerous supernatural world.What Lucien never imagined was that this strange condition he detested so much would be the key to transforming him into the most feared... and powerful vampire of all time....So, about the NTR stuff. Netorare? Absolutely not. Netori? I'll leave that up to fate... Oh, I almost forgot, there will be no incest in this novel.