Husband With Benefits - Chapter 1: The D- Day

Alex, a veteran soldier, meets an unexpected end on the battlefield. But instead of the final rest, he finds himself reborn into a new world—the magical realm of Harry Potter. Now a young boy, Alex is born into a Muggle family. Yet, despite his non-magical origins, his disciplined training and fierce determination uncover a rare, powerful talent for magic. With a world of spells, wands, and ancient secrets ahead of him, Alex will need every bit of his skill to face the growing darkness led by Voldemort. It’s a time before Harry Potter’s birth; James and Lily Potter are still alive. Join Alex’s journey as he navigates his way through Hogwarts, learns the mysteries of magic, and rises to face the deadly challenges that await, determined to become one of the greatest wizards in history.

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.

Holographic viewing technology allowed audience members to enter a movie and personally experience it for themselves. Naturally, romance movies were the most popular and well-received, while nobody was interested in horror movies.

Su Min was the first of the viewers to experience a horror movie.

Later–

Malicious Spirit: I dare not scare or frighten my sweetheart…

Su Min: Actually, horror movies aren’t scary at all.

Audience: No, no, no, you are playing in a love movie! (Loudly)

The audience suddenly discovered that the recent rerelease of the horror movie was much better than the original. Furthermore, to everyone’s surprise, the ghost was very sweet…

- Description from Novelupdates

Estaria, the Goddess of creation and eradication. The daughter of the God of destruction and the Goddess of life. Her father has been dead ever since she was born, and her mother disappeared without leaving a trace. In desperate times, as she grew old, she decided to bring her father back to life. But she had no idea where her father was. So, with nothing else to use, she thought of just recreating him through reincarnation. But the reincarnation process needed a woman whose body was strong enough to host the reincarnated vessel. With no options left, she crafted smaller deities using her own fresh and blood. Many of them failed. But one whom she named Nanako succeeded bearing a child she then named Hajime. Yet Hajime wasn't exactly what she expected. Because he possessed dual souls from two different people who died simultaneously in another world. But she was unaware of them due to one of the souls having fragments of his memories from when he was still alive in his past life. The other soul had completely forgotten everything, but bit by bit as the individual called Hajime journeys this new world, the memories of the other soul would start to retain giving him split personalities.