21st century Goguryeo - Chapter 54

To correct the mistakes of his past, a young man is forced to narrow the space between science and witchcraft, as he ventures on a quest to save his world from complete destruction.

The newly rebirthed Ye Jian doesn’t need love! What she wants is to stand high up above other people and to look down on them in disdain!

To those who have bullied me; who have disgraced me: I will return all your favors one by one.

Ever since her rebirth, she used her reputation to eat, yet she became an extraordinary military soldier.

He was born into wealth and could obviously use his family to eat, yet he had to use his own skills to become the youngest general.

He took a fancy to her; she tried to avoid him.

“You need to have a taste of romance.” He said.

“Leave! What I need are bullets!” she angrily replied.

The strong and strong fight; the strong and strong compete. This is the story of a strong military couple.

- Description from Novelupdates

Living in this apocalyptic world full of zombies and monsters, the rich rely on technology and the poor rely on mutation.

Shen Shanwu, 13 years old in appearance but 31 years old in reality, is a mutant that can alter his own appearance. Although he looks like a child on the outside, his wisdom is not very good. One day, he was just passing by when he was suddenly forcibly adopted by a major general, whom he didn’t know where he came from.

He resisted, but when he looked up, it turned out to be an old acquaintance.

The little boy, who could only hide behind him and cry, transformed into the unsmiling, cold, and tough man in front of him. And that expression of seeing a dead beloved is really unsightly…

Shen Shanwu: Can you smile?

Jing Huan: After Shanwu died, I couldn’t smile anymore.

Shen Shanwu: …Who? Who do you think is dead?

It took a long time before he found out about it. He found Jiang Huan crying and holding Shen Shanwu’s nameplate in the middle of the night and told his adopted son how good Shen Shanwu was… All of this…was seen by Shen Shanwu himself!

Jiang Huan (raising his gun): Since you have seen my embarrassing side, then I can only marry you or kill you.

Shen Shanwu: …

Shen Shanwu: Marry, marry, marry! I will recruit 800 zombies to carry you home!

- Description from Novelupdates

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.