Absolute Regression - Chapter 180

Kurokawa Risa is an ordinary office worker, who has practiced lots of cooking while living alone. One day, she wakes up in another world, with a concerned little spirit hovering over her! She has apparently been transported to a magical, spirit-filled realm by the will of the goddess, and there is no known way for her to go back. She is taken in by a wealthy couple, and they and her new spirit helper treat her with nothing but kindness. There is one problem, however–the food in this magical world is gross! Risa insists on helping the household cooking staff prepare a traditional meal from her world, and it is a big hit with her hosts. Soon Risa knows what she should do in this new world; she should open a cafe and treat everyone to delicious food!

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 fearsome heir of an empire, wielding power throughout his life, indifferent and cold by nature, yet devoted to her wholeheartedly.“Summer Sutton, the only woman I will ever marry in this lifetime!” At the engagement party arranged by his family with another woman, he arrives with her and blatantly kicks the white lotus out of the picture.Everyone knows that Summer Sutton is the one Adrian Walyon holds dear to his heart; whatever she desires, there is nothing he cannot provide.At her mere longing for him, he flies thousands of kilometers overnight to be by her side.At her mention of missing the taste of home, he orders food to be prepared and immediately air-shipped to her.When she expresses her wish to reach for the stars, he reserves an aerial restaurant 108 floors high, making the starlight accessible.“What else do you want?” he asks earnestly, gazing at her.She tiptoes up, wrapping him in her arms, “Adrian Walyon, all I want is you!”

After the 25th failed blind date, Chen Ji learned from the pain and decided to take the initiative to find a blind date on a public account in the same city.

The official account is very powerful, and I recommended four girls to him:

The first one, female, human, 28 years old, doctor, lived in the apocalypse four months after the sun went out.

The second one, the Nine Realms Human Race, the Empress of Destiny, fell asleep for 100,000 years after being invincible.

The third one, the daughter of the sheriff, is an ancient lady who is good at embroidery and loves poetry. She claims to have written a sequel to “Dream of Red Mansions”.

The fourth one, the descendant of the god, the saint of light, exudes a black aura all over her body, her limbs are twisted, and she is locked at the bottom of the church to pray devoutly.

At first, Chen Ji thought they were playing role-playing, but he didn’t realize until later——

“No, are you all real?”

“How does this allow me to meet you on a blind date?”

“I just had a blind date, how did I save the world?”

- Description from novelbuddy