The Spiteful Bride, Marry to Rival's Son - Chapter 171

In the depths of the underground world lived the descendants who were born and raised by feeding on the teats of beasts.

These individuals with special abilities and enhanced physical abilities were known as dungeon babies.

Amongst them, Kim Jin-Woo was born in the labyrinth on the lowest floor.

“I’ve never tried to become strong. I just wanted to survive.”

This is a story of a lowly tunnel digger who ascends the throne to become the king of a labyrinth.

Kawaki, who was born in the dragon vein of a planet (Altana), first met Umibozu who was traveling in the universe, and his girlfriend, Kouka.Later, he came to Earth by accident and met the teacher who affected his life —Yoshida Shouyou.He also met a group of friends. The most conspicuous among the group of friends is a fool with silver hair and naturally curly hair, a short man with purple hair, and a little devil whose catchphrase is “Not Zura, it's Katsura!”Gintama Doujin, not transmigration.

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.

Mu Haohao, the younger sister of the president of the Mu family, has a good appearance, a good family background, everything is good, but her life is a little shorter, at the age of 20.

Life is short so far, and relatives deeply regret at the funeral. Such a good girl has never even talked about love… Before the words fall, one, two, three, four, five men came… Each claimed to be a widow.

The deeds of the Sea King during his lifetime were exposed, and the scene of the rollover after his death was comparable to hell. The male protagonists have green lights on their heads, so angry that they are all reborn.

Blocked the shivering little girl in the corner and asked, “Speak, who to choose?!” – I thought it was a close competition, but only later did I realize that we… surrendered willingly.

[The heroine is not a sea king, but has hidden feelings] [1V1, Shuangjie] [Sweet pet, relaxed]

- Description from novelbuddy