First Immortal of the Sword - Chapter 1177: World Kings!

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

Xerox Zee had always thought of himself as an ordinary guy—just another face in the crowd. That was until his 18th birthday when his System finally gets Unlocked!.The System revealed a shocking truth: the world he lived in was exactly the same as the plot of a novel he had once read!But instead of being helpful, this turned out to be a big problem.Main Character : “I’m meant to save the world and become the strongest. Everyone else is just there to help me along the way!”Xerox Zee : “Hold on... am I just one of those people there to make him look better?”It seems like I'm just a stepping stones!

Zhang Siyi, a graduate student of architecture department went back from overseas seeking for work, he had a heated fight with his ex-girlfriend in a cafe. Angered, his ex-girlfriend was about to splash a cup of coffee in his direction but he managed to dodge it. As he stepped back, the misfortune was met by the handsome guy next table instead.

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates