He is Lovestruck in the Revenge - Chapter 258 - 251 Lets Get Married (first update)

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

A cursed CD game falls from the sky. I boot it up, build a ridiculously handsome villain with broken talents, and just as I hit “Start”—boom, I get electrocuted.Now I’ve reincarnated as Lucien Caelum Valebrandt, a six-year-old noble and the infamous villain who helped the Abyssians win the last war.Every 500 years, the Abyssian King is reborn. But when the 16 chosen heroes of this generation lost against the battle of the Abyssian King because of my character, the Goddess panicked—and rewound time.Now those same heroes remember everything… and they want me dead.Even though I just got here.All I wanted was to play a game. Now I’m the villain blamed for destroying the world.

Have you ever thought a monster that has a job of a summoner and a tamer

what should it call itself Monster Summoner? Monster Tamer? but he itself was a monster too

Watch as our mc travels the world as an reincarnated human who turn into a monster