World Apocalypse: Apocalust - Chapter 6: Walker?

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.

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

Lu Qingze, a people’s teacher, once transmigrated into a book and became an unfortunate imperial teacher.

Surrounded by wolves, either defect to the prime minister who has power over the government, or cultivate the young emperor into a generation of emperors through the ages.

Out of professional habit, Lu Qingze chose the latter.

No one is in awe of Lu Qingze, the emperor’s teacher who raised the young emperor with one hand. He has countless supporters of the imperial teacher. It is rumored that Lu Qingze has an ugly face, so he always wears a silver mask, lives in a secluded place, and rarely shows himself in front of others.

Only the young emperor knew what kind of pure and beautiful face lay beneath that mask.

After solving the trouble, Lu Qingze realized with hindsight that he raised the little cub to be a large wolf , and now the common enemy is gone, the little emperor started to move the people around him, and the next person who wants to fall to the ground is He; and now that the rabbits are dead, the dogs must be cooked!

- Description from Novelupdates

In the fourteenth year of the doomsday like a holographic game, Mo Ran, the top dead master, was cast aside by the three major races of humans, orcs, and elves.
Genocide? betray? Assassinated? This time, as long as I’m here, it’s impossible.
Humanity? Elf? Orcs? Take mine and return it, eat mine and spit it out, be prepared to pay the price!
Demining:
1. Gamification of doomsday is impossible, gamification of life is impossible, and gamification of doomsday is even more impossible. Don’t point at the background bar.
2. Both the heroine and the heroine are not good people. Everyone has different positions. They serve the plot. Don’t point at the hero and the heroine.
3. The author is glass-hearted, and all kinds of abuse will rebound ten times, don’t point at the author!

Content tags: Rebirth Doomsday Games online games Shuangwen
Search keywords: Protagonist: Mo Ran ┃ Supporting role: Ming Yuechen ┃ Others: doomsday, holographic, strong
One sentence introduction: As long as I don’t die, you are all scum.
Conception: In online games, no matter what adversity, as long as you persevere, you can win.

- Description from novelbuddy