Legend of Fu Yao - Chapter 2 - 17 Years Later

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

Masaru Ryunosuke is an outcast—a scholarship student in a school of elites, struggling to keep his head down in a world that looks down on him. But when a chance encounter with a vampire attack leaves him at death’s door, he wakes up to a new reality—he's no longer human.Now a ghoul, the lowest rank of undead, Masaru finds himself thrown into a world of ancient bloodlines, deadly supernatural creatures, and secret organizations hunting beings like him. His only guide? Akane Mikazuki, the cold and ruthless noble vampire who saved him, but only for her own mysterious reasons.Armed with the Cape of Dracula, an artifact of legendary power, and an unnatural potential that defies vampire logic, Masaru refuses to accept his fate as a weakling. If the world wants to treat him like a mere undead—then he’ll rise above them all and prove them wrong.As battles erupt between vampires, werewolves, assassins, and monstrous beings, Masaru must claw his way up the supernatural hierarchy before he’s devoured by forces beyond his comprehension. Because in this world, the weak exist only to be devoured.But what happens… when an undead refuses to stay at the bottom?

Su Ci was forced to marry the dying Second Master Shen, and the entire S City awaited her tragic fate. However, half a year later, Su Ci cured Second Master Shen and was adored by the Shen family. She is a personal disciple of a miraculous doctor, a top hacker, a racer, and the founder of a globally popular cosmeceutical brand. International conglomerate CEO Xiao Yizhou, genius director Lu Mingchen, and e-sports god anti all declared: “Su Ci is our dearest junior sister!”The man, rumored to be cold and violent, cornered Su Ci against the wall, gritting his teeth: “How many more identities do I not know about?” Su Ci smiled warmly and kissed the man's lips, “Just one last one, Mrs. Shen.”