Sword Sovereign of the Celestial Emperor - Chapter 71, Demon Core

When I woke up after a pretty crappy death, what greeted me was one of those famous fantasy worlds! I didn’t expect anything like becoming the strongest with a common job, or rising to the top with the weakest class…

Travel through the world of Naruto, activate the god-level forging system, and a super strong man has risen in the ninja world!

One after another artifact appeared in the ninja world one after another,

So the whole world is boiling!

Grass Pheasant Sword, Ten Fist Sword, One Hit Kill – Murasame!

The beheading sword, the Zanpakutō, the flowing blade is like fire・d solution!

Red Sand Scorpion: “My puppet is not worth mentioning in front of his ninja gear!”

Four Raikage: “What?

He can slash through my Thunder Dun armor with a single knife? ! ”

Madara Uchiha: “I can’t even beat his ninja gear. What kind of fourth ninja war is going on?”

- Description from novelbuddy

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.

Yeri was once a succubus, a powerful and irresistible seductress who fed on desire. Now reborn as a stunning young woman in the modern world, she must navigate the confusing collision of her human innocence and her demonic memories.One night, fate leads her into the path of Shin Keir, a dangerously magnetic and notorious CEO known for getting everything he wants—except peace. Their accidental encounter sparks an intense, uncontrollable passion, and a single night together changes everything.***Excerpt:The dream had returned.Same eerie forest. Same surreal woman in the crimson dress. But this time, the setting had changed slightly. She now stood at the edge of a cliff made of jagged, glowing red rocks that resembled oversized rubies.Scarlet butterflies floated around her like living embers.A thick fog blanketed the area like some forbidden realm between worlds.She turned to him, her smile soft, sweet—and somehow tragic.She was heartbreakingly beautiful, ethereal yet forlorn, like a love story written in fading ink.Shin had tried to call out, but the wind swallowed his voice. As he stepped forward, the woman mouthed something. He couldn't hear her.Then, in a horrifying instant, her body tilted, and she plummeted off the cliff.The despair that followed wasn't just a feeling—it was a full-body, soul-tearing scream that never made it past his throat.Without hesitation, Shin leapt after her.He awoke convulsing, drenched in cold sweat. His eyes gleamed with a strange madness, a devil struggling behind the polished CEO exterior.***Disclaimer- Places and characters are all works of fiction.