MTL - Scholar’s Advanced Technological System - Chapter 179 Physics, LV3!

A scientist, Duan Yixin, transmigrated into another world. She possessed the body of a sixteen-year-old girl but had not inherited any of her memories. With a broken marriage engagement and no money in her hand, she only wants to earn money peacefully. It's a pity that fate always plays tricks on people.When she thought she could finally live peacefully, she discovered that this world was not as simple as she thought. The man she rescued was the notorious ruthless general, and the woman who stole her ex-fiancé was the female protagonist of this world.She looked up at the sky and asked, “God, are you kidding me?”A few years later, on their wedding night, she stared at him and said seriously, “General, I'm not your white moonlight.”The man lowered his head and whispered in her ear, “Mhm, you are not my white moonlight, you are my life.”

Eighty years ago, the Abyss suddenly descended upon Yan Luo's world. Humankind was shocked to discover that their most proud weaponry struggles to kill even the weakest demons from the Abyss.The birth of Engravings is a silver lining, which enables humans to harness magic power, drastically enhancing their personal combat abilities against demons.Yan Luo, who determines to be a demon hunter since he was young, however, finds himself unable to imprint any Engravings, but he still decides to embark on his demon-hunting journey even without magic power.“...That can't be right, you haven't gone through the Engraving yet. I see no record of it here, and you're leaving already?”“Quickly register me. I need to reach the exploration town before nightfall.”“Kid, come back if you can't handle it! No one will laugh at you!”

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates

Shi Jin was a desperate woman and just a pretty face in her past life. She was swapped at birth and brought up in a rich family, only to eventually die a horrible death.