How Do Protagonists Use Ghost Systems To Overcome Villainous Rivals?

Starting with a boy named Daffa Setyawan who is constantly bullied, he unexpectedly gains a system power to eliminate the bullies at his school. However, instead of just targeting the bullies, he inadvertently attracts the attention of all the gangs in the city, making himself the hunted. Will he succeed in conquering both the school and the city, and be able to control the situation?

When Elowen learned that she had been switched at birth, that her life as a princess was nothing more than a mistake, she quietly accepted her fate. She accepted being treated as an error. Accepted being hurt so deeply that even crying had to be done in secret. She believed she would fade away like this — silently, unnoticed, forgotten. Until one day — when despair pushed her to the edge — she felt a faint chill, as if someone were standing behind her, protecting her without a word. From that moment on, Elowen knew she was no longer alone. — Adrian survived a horrific car accident. His body lay motionless in a hospital bed, while his soul became bound to a wounded girl he had never known. He couldn’t hold her. Couldn’t shield her from harm. Yet when she was starved, warm food appeared in her drawer. When she was bullied, her tormentors met with inexplicable accidents. When she curled up crying in the dead of night, an invisible hand gently rested on her forehead—so tender it hurt. Adrian was there. Quieter than any living person. He witnessed every wound, remembered every tear, every trembling breath she tried to suppress. Affection grew in silence—slowly, carefully—as if one careless step closer would cause the girl to shatter. One was alive, yet denied a life. One was dead, yet still learning how to protect someone. Some forms of protection need no light. Some kinds of love cannot be touched. — Then one day, Elowen spoke seriously to her “Ms. Ghost”: Elowen: “Ms. Ghost, if you’re lonely…” “Maybe you could bond with a male ghost.” “I’d give you my blessing.” Adrian: … Then the “Ms. Ghost” coldly placed a hand on her forehead. Adrian: “Call me Mr. Ghost.”

He was supposed to be nobody. Born with crippled spiritual roots in the weakest corner of the Mortal Heaven Continent, he spent his early years mocked by peers, dismissed by elders, and written off as a waste of a bloodline. The world had a plan for people like him — obscurity, mediocrity, a quiet death at the bottom of the cultivation ladder. Then the System arrived. Rude, chaotic, and absolutely unhinged, the Infinite Chaos System begins issuing missions so absurd they border on cosmic comedy — slap an arrogant Young Master, steal from a forbidden ruin, insult a Heavenly Lord to his face. And somehow, at the end of every ridiculous task, he walks away stronger than before. What begins as a shameless scramble for survival slowly reveals something far more terrifying. His talent isn't crippled. It was sealed. His bloodline isn't ordinary. It was buried. And the System that appears to be helping him? It was never designed to help anyone. As he rises from a forgotten boy in a forgotten kingdom to a figure that shakes the foundations of all Nine Realms — and the ancient dimensions lurking beyond them — the truth peels back in layers. The history of the cosmos is a lie. The gods who rule from their thrones are terrified. The first user of his System already conquered everything and nearly destroyed it all. And somewhere at the end of every road, a question waits: what do you do when you've beaten every enemy, unraveled every secret, and the universe itself asks you to become its next ruler? He laughs, pockets another ancient treasure, and causes more problems.

When there is another version of you which is unapologetically evil and you can't fight it out of sight, you can only be replaced

I came to Vane Capital to destroy the man who murdered my father’s legacy. But I didn't expect to be caught mid-hack by Julian Vane himself. ​Now, I’m his 'Golden Captive'—blackmailed into a deadly game of corporate espionage. Locked in his penthouse, I’m forced to work inches away from the man I swore to ruin. But as bullets fly and the real traitor emerges from the shadows, I realize that Julian isn't the monster I memorized. He’s a victim of the same conspiracy that crushed my family. ​In a world of blood and binary, the line between revenge and desire is razor-thin. I was the 'Ghost' in his machine, but now, I’m the only one who can keep us both alive. The hunt is on, and this time, we’re taking no prisoners.

In a world with machines and angels, the main character has to become the strongest to avoid getting killed and discarded.