Sin System: Demonic Harem After Reincarnation

In a world where strength rules, Oliver is nothing—a talentless outcast doomed to be weak. Beaten down and forgotten, he’s on the brink of giving up… until a mysterious system awakens within him. It whispers of power, demanding he complete dangerous tasks in exchange for strength. With every mission, he levels up, evolving from a nobody into a force to be feared. But the path to the top is ruthless, and the system has its own secrets. Will he conquer destiny—or become its pawn?

After been killed by his cheating girlfriend's heartthrob, Donald finds himself reincarnated within the body of a weak hunter in another universe. He somehow is bestowed with a system upon his death and got transmigrated by its powers. In this apocalyptic world where monsters and demons thrive, Donald must complete every mission the system asks him to do in order to become more powerful and have his revenge on those who scorned him—even if he has to destroy the world to achieve this. And even if he has to become a villain to become more powerful, he is willing to walk that path. After all, humanity is already sunken beyond redemption. This is the purpose of the system—the Renegade System with which he awakened!

Mo Shen was a cultivator known across the world for his evil dead and lewd cultivation method, he was chased to the mountain peaks by emperors and powerful cultivators. Not willing to die, he used a forbidden technique that created a portal which poured demons into the world while his Soul was sent to a new world. I own the right to the cover.

WARNING: MATURE CONTENT.. THIS BOOK IS RATED 18+... When Greg opened his eyes in a strange bed in a world not his own, he expected confusion, not a glowing screen that labeled him as a “Host.” But the system that bound itself to him wasn’t one of swords, spells, or cultivation it was something far more dangerous. The Lust System rewards desire. Each act of intimacy, every temptation indulged, every line crossed earns Greg "lust points" points that can heal wounds, unlock powers, and strengthen his body. But not all missions are equivalent with each other. The more dangerous, taboo and evil the act, the higher the reward from the system. When even looking into the healer’s eyes is labeled “average danger,” Greg realizes this isn’t just a game. Each mission tests not only his performance he did but also his rezilient. Will he use the system to grow stronger, or will he turn to something unrecognizable ? Caught up between survival, confusion, and evil deeds, Greg must walk between a line of man and monster in a world where temptation can kill mean weakness of man.

"In the gritty streets of City X, James, an endlessly heartbroken man, faces a cascade of breakups due to his financial struggles. Little did he know that his life was about to take a surreal turn. A mysterious system grants him unimaginable wealth and skills, just by signing in every day. As James grapples with newfound affluence, navigating love and life in a world that suddenly seems too good to be true.”

In the war-scarred realm of Valecross, every sixteen-year-old awakens a Spirit Gift, except Liam Cross. Branded The Powerless, mocked, and hunted in Ravenhold Academy, he’s destined for failure. Until one night, a black crystal pendant, the last relic of his mother, shatters awake. Inside it stirs a forbidden System unlike any ever seen. It tracks his strength, speed, and quests like a living game. As Liam secretly grows stronger, dark forces begin to move, rivals who fear him, and a prophecy that calls him the Echo Chosen, the one who will either save Valecross... or destroy it. When monsters from the Rift return to devour the academy, Liam must decide: Embrace the Shadow System, or let the same monsters that took his family make him lose everything.

"Who the hell or what the hell are you? And why are you in my head?" "I am your system interface. Host identified: Alexander Todd." *** Alec lived in a city where power meant everything. Bullied and overlooked in school for being poor and different, he was seen as powerless. One day, after another harsh encounter, he blacked out and was left alone in the rain. Something strange happened that day, something that changed him. He didn’t wake up for days, until a sudden sound in his head brought him back. From that moment, Alec’s life began to shift in ways he never expected.

I was abandoned, humiliated, and looked down on. But after gaining the system, I’ll make everyone bow before me, no matter how impossible the system’s quests are.

Lucas was framed for robbery and Arrested by the police. His mother-in-law also despised him and planned his demise which led to his untimely death Bang! A car ran Lucas through and when he was just at death door, he heard a voice. Ding! Ding! “Welcome to the Tycoon system…” “Do host wish to live or die?”

Malcolm Shade is the neglected son of his father, CEO of Shade Corporation. After living a miserable life, he is killed by mysterious circumstances and regresses to the past with his memories and a strange System. Read as Malcolm rises to the top of the business and academic world with the power of his System and the knowledge of the future.