Sin System: Demonic Harem After Reincarnation

When E-Class warrior Xayn walks in on his girlfriend with the guild master, his world shatters. Moments later, he’s thrown into a death trap; bleeding, broken, and forgotten. But just before the end, a mysterious system awakens within him. Now, with power unlike anything the world has seen, Xayn rises from the shadows. Stronger. Smarter. Unstoppable. As he uncovers the dark truth behind his father’s murder, topples corrupt guilds, and exposes monsters wearing human faces, one thing becomes clear, the weakest warrior is about to change everything, and this time, he’s not holding back.

Thomas was well-fed up. Poverty took away all his happiness. He hated his parents, who left him nothing. Apart from the house which has even been sold and a necklace with his name on it. But when he uses it. A miracle happened, the system has awakened! [Peaking anger detected. The system has been resurrected!] [Welcome Mr. Thomas Zerach, the super-rich system has been revived, whatever you want, you can get it. Revenge will be avenged!]

Aiden's lavish lifestyle came to an abrupt halt when his bank froze his accounts and seized his fortune, inherited from his late parents. With no choice but to return home for an extended stay, Aiden received a cryptic message and task from his father's attorney - spend a designated amount of money each week or month for a year or forfeit all rights as the sole heir to the fortune. But Aiden soon discovered that there was more to the challenge than just spending his money. Picking up a mysterious green credit card, Aiden was transported into an alternate world where magic and technology coexisted. Here, Aiden's spending habits would be put to the test, and the stakes were high. Aiden found himself navigating a treacherous thrifty system, where wise spending choices were paramount. He was forced to confront his extravagant and wild lifestyle head-on, and soon found that it was not as easy as he had initially thought. With his inheritance and future at risk, Aiden had to choose between the life he had always known or a newfound path filled with secrets, danger, and uncertainty. Join Aiden on a thrilling journey as he unravels the mysteries of his inheritance, learns the true value of money, and discovers a world beyond his wildest dreams.

With the magical [system of cultivating immortality], the reborn Tang Fei began his legendary journey! Counter attack and upgrade, collect treasures and valuable books, conquer beasts and beauties... Let’s witness Tang Fei’s journey to become the Immortal God!

Abel was beaten nearly to death by school bullies for daring to ask out the school belle. On the brink of death, he was saved by a mysterious entity, the Super Versatile System. It merged with him, granting him powerful skills and abilities. At first Abel thought he was special and is the only one with special abilities. That illusion shattered when he was exposed to the supernatural world. Even worse, his father was taken by powerful, unknown beings, and his fate remains a mystery. Dead or alive, no one knows. Determined to grow stronger and rescue his father, Abel swore to make the most of his new abilities. To upgrade his system faster, he had no choice but to join the entertainment industry as a boss figure. But when night falls, he becomes something else entirely, an executioner, hunting and killing the demonic beings that have escaped from another realm.

Ethan Cross, a struggling orphan living in the slums, awakens a hidden system after a life-threatening encounter with a powerful noble. The system grants him access to hidden knowledge, martial skills, and an evolving interface that allows him to manipulate reality. Ethan begins his climb from the gutter, navigating through dangerous political games, ruthless guilds, and ancient dungeons. As his power grows, so does the danger — for the system he wields holds the key to an ancient prophecy that could reshape the fate of the world.

Intelligence, Deceit, Cunning and Luck are concepts that tie to genius. Louis, who was born with above average intelligence, got all four concepts and became a true genius. And a true genius becomes a double-sided sword. Will it be a problem solver? or even a trouble maker? It all started when Louis got an injection of nanoparticles into his body. Something much higher than modern words appears and changes Louis' life. The system appears and allows Louis to make the impossible possible. He will easily solve the criminal cases he handles. What awaited him in the days to come were cases that were more complicated and would require even greater effort to deal with. (Some events that occur and locations are indeed inspired by the real world but have nothing to do with real life)

Framed for murder. Thrown into The Pit. Left to die. Kael Ardan was just another street rat in New Veyra, a city where the strong rule and the weak are nothing. But when betrayal sends him to the city’s most brutal underground prison, he’s given a single choice — die like the rest, or listen to the voice calling from the darkness. > “The Void has chosen you. Devour, evolve, ascend.” Bound to the mysterious Void System, Kael gains the power to absorb the strength of his enemies, upgrade his abilities, and shatter the rules of reality itself. From the shadows of the slums to the shining towers of the corporate elite, from battling street gangs to facing supernatural clans and interdimensional invaders, Kael will rise — and every level-up will be paid for in blood. In a world where power is everything, Kael is about to become the one name that even gods fear to speak.

Aarav is seen as a useless parasite to everyone, including his wife who is having an affair with a rich man. Just one day after being falsely accused of going to prison and bullying, the death of his mother, and having his restaurant confiscated by the bank because of debts, a powerful money system suddenly emerged. Ever since the system came into existence, Aarav has come to know a dark secret his family has been keeping. Now he has a goal: to make sure that people, including the black organization that killed his father, pay for what they did.

Betrayed. Cast aside. Killed. Valor Harder, once the world's strongest hero, lost everything when he sealed his rogue son, Dusk, in the Astral Sanctum. Stripped of power and left to die, he uncovered secrets about a world ruled from the shadows—but was executed before he could act. Reborn as Ashen Azarious, a mere boy with a mysterious system, he must rise through the ranks of All Valley Academy, battling oppression, uncovering the truth, and preparing for Dusk’s inevitable return. The world is broken, but Ashen refuses to be a pawn. This time, the hero will fight back.