Mash-up Anime World: Creating the SCP Foundation to Contain Anomalies - Chapter 271 - 266: Fear Stems from Insufficient Firepower

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.

Damien reveals an ugly truth.His sister and only family, Ahara, leaves the house every midnight whilst he's asleep—a time that he soon discovers is when man-eating beasts named Rouges start hunting for prey.Unable to question her directly, he decides to investigate her and quickly figures that Ahara isn't human but rather, a vampire hero who saves them from beings like herself coming from a world she calls Gibbous—a place where entities like vampires, wizards, and beast shifters alike reside. What’s more, he also learns that the real reason behind his parents' death was the leader of the Rogues, who's rumored to have escaped after Damien’s father almost killed him.A series of fateful events lead to Damien’s long-lost power reawakening in him, and he finds himself with no choice but to return to Gibbous, a strange world where power means survival, and weakness leads to death. As such, Damien enrolls in an academy to train his newfound abilities with one thing in mind...Becoming more powerful.However, he soon discovers that the path to power is one filled with troubles and pain, and he isn’t alone in this lust for more at the academy. It’s a bloody competition against time and formidable opponents, and only those willing to sacrifice their comfort are the ones who can attain it.With a deadly foe lurking in the shadows somewhere and a strong desire to protect his sister, Damein has no choice but to fight.The only way is up, and he is going to be standing at the top of them all, ready to counter any enemy.

Alexander Sirius’ life has hit rock bottom, his parents hate him, he lives under the shadow of his genius sister, and even his own girlfriend cheats on him, all this changed when he gets another chance.

Transported to Another World? Cultivation World? A Modern World? How about all of them? From countless planets in the Universe, Each planet has its own technology, culture, and civilization.

In another world, carrying all the traumas with him, would he manage to reform himself and become the sovereign of his life?

[Host has Gacha System]
"Okay, what can you do?"
[I am a Gacha System, so I only have Gacha]
"Only Gacha? How about godly pills or overpower techniques?"
[Everything can be acquired with Gacha because Gacha is all you need]
"Gacha usually is only a complement for the Main System such as RPG System. You are not useless, right?"
[THERE IS NO USELESS SYSTEM, ONLY USELESS HOST]

Join this 'Loser" with his 'Useless System' As they start their journey.

Another Work: The Magician of Sound

(I'm not a native English speaker. I have done some editing to fix my Early Chapters' Mistakes, but it is still not all of them)

******EXTREME CAUTION******

If you are searching for MC with a strong mentality and high intelligence or Independent and Strong Heroines from the start, this is not your thing. This is going to be a 'very slow' pace development in MC Character, the same applies to the Heroines. So rather than Giving bad reviews, I advise you to 'Not' read it rather than complaining about it later Discord: https://discord.gg/HYvMbb4