Isekai Maou to Shoukan Shoujo no Dorei Majutsu - Volume 9 Chapter 2 part1-9

A pair of young girls that appear to be the same age act like a mother and a daughter. They are on a journey for one reason: to obtain a medicine that will stave off the daughter’s disease. Killing demons, deceiving people, and giving her everything in hope that there’s a way of rescuing her daughter. This is the story of their fragile hope and overwhelming despair.

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.

Jeanne was only 18 years old when her stepmother and step sister framed her and caused her to lose everything. She was thrown out of the house by her father for trying to resist.

7 years later, Jeanne came back for vengeance with a mysterious son by her side—George.

People mocked her for being a single mother and called her son a fatherless child.

“Who are you calling a fatherless child? You wouldn’t like me when I’m mad,” George threatened.

“Lay low, George! Don’t ruin the fun! I haven’t had enough,” Jeanne said as she wanted to enjoy her revenge, leaving the boy speechless.

Jeanne later met the infamous Fourth Master Swan at a charity ball. The man with the handsome looks and cold temperament called her to a corner and said, “I like you.”

Everyone was shocked, including Jeanne.

“I’m a single mother and I have a child. Are you sure you like me?” she said.

“I actually… like your child!”

Everyone else was shocked when Fourth Master Swan married Jeanne but only his sly self knew that he had gotten not one, but two, important players to this chess game that he was playing.

This script was originally supposed to be about a Scum Gong x Cheap Shou — the Scum Gong abuses the Cheap Shou, the Cheap Shou became hopelessly apathetic, the Scum Gong became a Cheap Gong, and the Cheap Shou abuses the Cheap Gong.

That should have been the case!!!!!

But the script began to unfold—-

The Scum Gong was reborn to the past, and encountered the Cheap Shou who also got reborn.

The Scum Gong was horrified to discover that the Cheap Shou had changed his job and became a beast-like, ruthless, blackened Gong, ahhhhh help!

The f*cking miserable Scum Gong was taken and defiled, then defiled and taken, then after being taken from the front he was taken from the back, and finally he was taken into a loyal dog, sensual, tsundere Shou!

- Description from Novelupdates