I will become the Demon Immortal known to the whole world - Chapter 41 - Slaughter Entering the City

Life can be very unfair most of the time, and Christopher is someone who knows this very well.Being an orphan, his chances of achieving great things in life were close to nil. But things change when he meets his lover. However, a series of events lead to his death.But that isn't the end. He wakes up in the body of someone just like him in another world, and with a system, one with an incredible ability.With his newfound cheat, he completely sweeps his way through the world and beyond.Angels? Demons? Dragons? Gods? Their titles don't matter, because in the end they will only have two options. Submit or die.

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

The day Louis discovered his girlfriend's betrayal, he died from a gunshot wound to the head. Fortunately, fate smiled on him and allowed him to be reincarnated in a magical world as the youngest son of an SSS-class family.That same day, he awakened his Class—an event that should have marked the beginning of his rise.Instead, it marked his downfall.[Ding! You have awakened an SSS-Rank Class.][Class: God of Money][Rank: SSS]A god? Yes, that's beautiful. But a god of money? In the eyes of his proud family, that title was a joke—an insult. The weakest, most useless Class imaginable.So, they banished him, stripped him of the family name, and cast him aside without a second thought.But they were unaware of his skill, abilities, and the potential that money could bring.He smiled as he saw himself banished and looked at the system.“If you fire me, it's okay. I'll keep creating missions even if I end up in a garbage dump, and I'll come back for your heads someday.”Two system messages flashed before him.[Your actions generate money, and money makes you stronger.][You have the ability to create missions.]Under the influence of his newly acquired Class, he will delve into all the magical paths this world offers, become embroiled in political intrigue, and conquer kingdoms on his own.“Money? I'm the God. Women?” That's fine—I have plenty.

On a certain day, a certain thought came to Japan’s Sun Goddess. ——Aren’t there too many Japanese people being abducted to other worlds? It’s true that the large majority of Japanese are diligent and docile and soft-hearted, which makes them pretty much the best people to ask for favors. “But recently it’s just gotten way too out of hand…… Oh, I’ve got it! Whenever a Japanese person is summoned, I just have to summon an otherworlder!” And now, every time a Japanese person is summoned, princesses and elves and beastmen and whatnot are reverse-summoned. Under the acknowledgement of the government, they begin living in Japan. Today, too, Japan is at peace. And so begins this laidback isekai cultural exchange story♪