MTL - Joy of Life - ~ Second, she is called the princess.

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.

*WARNING: Minor Girls and boys should stay away!*When an introverted nobody meets an untimely and embarrassing end in his bathroom, his journey doesn’t end there.Reincarnated in an urban world as a father, he finds out his son is destined Heavenly Child —a young man blessed by the heavens with unimaginable fate—he’s thrust into a life filled with fame, power, riches, and women. But this isn’t a typical shit story.While many 'noobie' seems like the main character in a classic hero’s tale, 'Alex' our reincarnated middleman decides to forge his own path.Navigating the intricate webs of powerful families, he reshapes his fate using sharp wit, newfound confidence, and an unexpected advantage to pursue everything he’s ever dreamed of.But why does his son, blessed with unimaginable potential, live as a son-in-law to a third-rate family? As mysteries unfold, revelations of magic, cultivation, and an impending apocalypse emerge. And why a daughter? How will she fit into this intricate web of destiny?Note/Warning:This novel is entirely fictional. Events, characters, and settings are not based on the real world and will evolve according to reader wishes. Expect updates a minimum of 4 chapters per week (unless the author decides otherwise).Join a tale of ambition, power, and family dynamics in a world where the lines between protagonist and supporting characters blur. Who will truly claim the throne of destiny?

Chi Zhao binds with the slag shou system, and if he succeeds in his missions, he will be rewarded.

But who said life is easy!

A rich old man who was slagged by him: “I know you love me. Your past pains, I’ve already investigated them.”

The star admiral who had been slagged by him: “Don’t be reluctant anymore! I’ve always known that you didn’t betray me.”

The entertainment mogul who was slagged by him: “Don’t make any noise. Honey, will you come home with me?”

The dark sentinel who was slagged by him: “Now, do you still want to say that it is not my child?”

The prince regent who was slagged by him said, “The mountains and rivers are yours, but you are mine.”

…

Chi Zhao burst into tears: “Boss, believe me just this once. Let me get the reward, okay?”

Thinking that the acting is very good, in fact, every day he’s spreading meng.

- Description from Novelupdates

Quenser and Heivia came back from their one week vacation. The next stage that awaits the two is the experimental battlefield ‘Madagascar’, a huge island on the east side of the African continent. Quenser and the others have been sent to destroy the second-generation object from the Faith Organization: Trinity Style. The worst tropical night ever begins now!

Heavy Object EX chapters are being released with each volume of the Heavy Object anime home releases (blu-ray / DVD) in Japan.