My Girlfriend's Secret - Chapter 179: Brave Boy, Go Forth and Create a Miracle

The character with the highest difficulty and the worst performance, Baek Yuseol, was considered a trash character in-game because he could not use magic in a fantasy setting where everyone else could.However…[Because the wrong ending has been reached, 90% of Aether World has been destroyed.] [Please reach the “True Ending.”] Suddenly, those words echoed in my mind before I was transmigrated to the Aether World.[You can use the skill “Blink.”] “Just why did I possess this character?”Blink was the only magic skill I had.Surviving in Stella Academy among genius mages, I became the notorious Blink Mage.Alternative title: I Became A Flashing Genius At The Magic Academy

The male student, Fukai Nagamasa, ignores his studies for college entrance exams in favor of following the path to chuunibyou. As he fainted during night cramming session before the exams, he realized that he was transported to a parallel world as a feudal lord in the Sengoku Era. Not to mention that suddenly, he was marrying the sixth Demon King, Oda Nobunaga’s little sister, the one who was purported to be an unrivaled beauty?

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