DxD - Multiverse: Daily Life Of The Sephiroth Hero - Chapter 10

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.

He is the genuine diamond bachelor of G City, ranking first in terms of net worth,Everyone knows that he had a deep and unforgettable love,But no one knows that, five years ago, he had a nominal marriage;She is the super nurse of G City People Hospital, with neither wealth nor high education,Everyone knows that she is divorced and has a child in tow,But no one knows that her ex-husband, the father of her child, is the man at the very top of the pyramid.Scene One:On the day she was diagnosed to be pregnant, her husband registered on the marriage certificate came back.The next day, at the breakfast table, an A4 sheet of paper appeared very abruptly by his right hand.“This is a divorce agreement, please sign it.” She said, her internal organs trembling.“...Is there someone else?” He put down his chopsticks, looked at her, and asked calmly, his eyebrows almost imperceptibly twitching.He came back because there was something he wanted to talk to her, but now it seemed unnecessary.“...Yes.” Having a child should count as having someone else, because from now on, she would love her child.When they got married back then, he had said that if she had a lover, she could ask him for a divorce.“Alright, I understand.” He nodded, picked up the agreement on the table, and left.“...”Scene Two:“What's your name?”“Axel Hawkins.”“Your last name is Hawkins?” The mother's name is Carolline Ruiz, his ex-wife, and the father's column is left blank, isn't it?“Yes, my dad's name is Bryan Hawkins, he's a Sky Walker.”“...”At five in the afternoon, Carolline Ruiz picked up her son from school and saw him standing next to her son; she instinctively turned around and ran.Bryan Hawkins left Axel Hawkins in the Guard Room, warned him not to run around, and then chased after her with his long legs.“Carolline Ruiz, stop.”“..” Almost instinctively, she really stopped.He slowly walked over and stood in front of her, a tall and imposing figure blocking all the setting sun.Carolline Ruiz couldn't help but look up, the afterglow of the setting sun illuminating his face, she couldn't see his features clearly at all.“What are you running for? If you dare to secretly love for eight years, do you dare to openly love for a lifetime?”“...”

Due to her family's worsening financial situation and the need to pay off her late father's debts, Isabella Quinn was forced to agree to a marriage proposal offered by Juliana Brown, to marry her son, Hunter William Brown, who had disabilities including paralysis and impotence.At that time, she had a boyfriend, Joe Fernando. However, she convinced Joe that the marriage was only temporary and that one day they would be together again.But when the marriage took place, Isabella was shocked to discover that Hunter was not as afflicted as she had thought.This fact left her feeling trapped, confused, and lacking the courage to tell either Joe or Juliana.What did she find out? Was it something that could make her fall in love with Hunter? Or the opposite? And what about Joe, who remained loyal while waiting for her?

Because of her beauty, Dr. Su is visited by dozens or even hundreds of patients every day for various ailments like hemorrhoids and toothaches.Unexpectedly, there comes an even more outrageous claim: “Doctor, I'm injured there!”Just as Su Mei Xi was about to get angry, she realized it was the man she had met two months ago.Back then, he had been composed, but today, he claimed responsibility and they immediately registered for marriage at the civil affairs bureau, walking out with two red certificates.Initially, she thought she merely found a giant tree to lean on for shelter. However, when her ex-boyfriend, stepbrother... continuously came to harass her, she discovered that this tree not only had exceptional strength, a deep background, and mysterious origins but could also cook, wash clothes, and make beds...And then, one day, a helicopter landed, and he descended from the rooftop. Only then did she realize he was actually a distinguished war god!