Shota's Isekai NTR Adventure - Chapter 686 It seems like I need to be careful

Warning!!! Mature Content (R18)

Yuan wakes up in the body of an 18-year-old boy who oddly resembles his former self from Earth and also goes by the same name. He was an orphan on Earth who passed away after being told that he had leukemia because he was unable to pay for his treatment because he was struggling to make ends meet.

[Ding! The system has successfully rebooted.]

Watch this brilliant young man as he and his partners achieve the pinnacle of cultivation and go on to become legendary figures in the future.

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Under the starry sky, all races compete for the front.

The human youth Ye Huan has mutated eyes.

Don’t forget, it’s just basic exercises.

Martial arts, just watch it once.

If you read the exercises once, you are cultivating.

The medicinal pill came out after watching the refining process, and it could be optimized.

Yuanguo, Yuancao, the year has increased at a glance.

Ten thousand clan exercises and secret skills, just looking at them, they become human clan exercises and secret skills.

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Under the starry sky, Ye Huan convinces all the tribes.

- Description from novelbuddy

After crossing the first day, Hu Xiaoxiao beat the Emperor.On the second day of travelling, Hu Xiaoxiao beat up the Imperial Consort.The third day after crossing …“The empress has left the palace!”However, before he could walk out of the city gate, Hu Xiaoxiao was carried back by a man.The extraordinarily handsome emperor was so angry that he laughed sinisterly, “You haven't even given birth to your son yet, where do you want to run to?”

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.