Sin System: Demonic Harem After Reincarnation

The human race has been at war with the vicious blood-thirsty humanoid-alien species that had appeared because of the illegal experiments that took place in the world many years ago. Just when they thought they had successfully annihilated them all, they began to rise again. This time with the sole purpose of taking over the entire human race. It is at this cause that Angel Academy, a military-like school was built. For years, it helped the world by building up potential ability users in preparation for the upcoming great war. -------- Max isn't able to awaken any ability and even knowing the fact that he'll be ridiculed by his mates, he was sent to the Academy to study. Every day his life is made a living hell by everyone around him, he was turned into a laughing stock. One day he is driven to a part of no return and is on the verge of dying but that is when he met his saviour. He is given a system that will help him grow and become an unrivalled demon lord.

Michael Roy was once a promising finance analyst with a bright future. Then he discovered something he was never supposed to see—financial transactions connecting his company to a dangerous criminal network. Before he could expose the truth, Michael was framed for a crime he didn't commit. His reputation was destroyed, the woman he loved turned against him, and he was sent to prison. Six months later, Michael walked out with nothing but his mother's faith and a burning desire for the truth. Then everything changed. Inside prison, Michael awakened the Infinite Opulent System, a mysterious system capable of giving him wealth beyond imagination, extraordinary abilities, and opportunities that ordinary people could never reach. But the System comes with one absolute rule: Its existence must never be revealed. With unlimited wealth at his disposal, Michael could simply buy his way into the world's elite. Instead, he decides to build an empire. His first move is acquiring a majority stake in Visteria Hospitality Group, a struggling billion-dollar company filled with luxury hotels, restaurants, hidden problems, and powerful executives. As Michael transforms failing businesses into thriving empires, his name slowly begins to spread through the business world. But wealth isn't the only thing waiting for him. Behind Visteria's financial irregularities, Michael discovers familiar patterns—hidden payments, corrupt executives, manipulated contracts, and people connected to the same kind of secrets that destroyed his old life. Now Michael has two goals: Build an empire powerful enough to change his world. And uncover the people who tried to bury him. They thought they had destroyed Michael Roy. They didn't know they had created the man who could buy the world.

As the King of Death in his previous life, Ainz Dorak was a formidable and fearsome ruler. He commanded an army of dark and terrifying creatures, instilling fear and awe in all who crossed his path. His power was unmatched, his reign absolute in the underworld. Despite his immense power and influence, Ainz Dorak could not escape the treachery and betrayal that ultimately led to his downfall. His enemies conspired against him, and so, he met his end, his power and glory fading into memory, so he thought, but something else happened at the point where he thought he had lost everything. Ainz suddenly woke up in a different place, another world to be precise, a world as cruel and twisted, and similar to his previous world, yet different. In this world, Ainz was rebirthed as an abandoned child of a noble, where he learns of the cruel fate of his reality. However, by chance, he was reincarnated with a system; The Shadow Monarch System, through the system, he lives the life of a Shadow Halfing turned Monarch, while making power his only reason for living. Following the path that has been laid out for him through the system, he would pave his path with his army of dark and terrifying creatures, as he snatched the lives of his enemies until he was once again called the king of death. ----------- [Congratulations! You have accepted Mark of the Shadows!] [You now bear a faint scent of Shadow!] [Shadows now recognizes you as their own!]

Maximus Akkris Gayle was a poor student, abandoned by his father's family. His girlfriend betrayed him, making him lose his temper and almost caused his own death. Not just that, his girlfriend left him for his step brother, Daniel Akkris Gayle. Maximus angrily attacked the Kera kingdom heir, making Daniel unleash his ability on him. Knocked out cold, he was presumed dead by his brother and his girlfriend showed no remorse towards what had befallen him. However, that was to be the end of his misfortunes because he awakened a system, The Ozilla Gold System which supplied him with money, and plethora of abilities endlessly. In exchange, Maximus will perform missions to earn system coins, which can then be used to acquire more wealth from the system. He can finally take revenge on those who trampled on him, dominating the world while helping the needy. **** But the endless supply of money didn't come free. The life-threatening missions which the system sends him on were objects of eternal nightmares to the hero, who suddenly found out that the fate of the entire world rests on his shoulders. Join Maximus Akkris Gayle in his thrilling but frightening adventures and face-slapping missions, having a wonderful time is definitely assured. THE OZILLA GOLD SYSTEM...

In 2068, humans mutated to survive in the post-apocalyptic world. They got extra genes in their DNA, granting them cool abilities like super strength or shooting fire from their hands to battle the cruel monsters dominating the Earth. In New Orleans, a dystopian country, there was a special school to train young talents called Neogen High-School. All kinds of talents and abilities are there, and every Neogen graduate would become part of the New Government, joining the Elite Rangers, a special and highest-ranked force in New Orleans. However, Avery was an exception. He got into Neogen on a scholarship but got treated like an outcast 'cause he didn't have any special talents. He stuck at the bottom of the social ladder. Coming from a rough background, he was always underestimated, and even turned into a walking ashtray for his classmates. One day, he was thrown into a dark abyss by someone he thought was his only friend, and he fell into the bottom pit to meet his death. "Yeah, maybe this is the best path for someone talentless like me. Dying alone in a dark and lonely place like this." [Ding!] [All conditions for activating the 'Underdog System' have been met. Avery Blythe has been chosen as the host system.] [Underdog System will be activated.] [… 99%] [Underdog System activated. Complete all quests and climb the social ladder. Don't let the bullies win. Show that an underdog can beat them all!] "... huh?"

Derrick Stones is the kind of manager everyone despises. Feared by his employees and respected only for the results he delivers, he believes compassion is for the weak. Long hours, unpaid overtime, salary deductions, and public humiliation are just another day's work. To Derrick, people are nothing more than tools to be used and discarded. Until the day he crosses a line. After attempting to harass a young intern during a company dinner, Derrick is struck in the head with a wine bottle in self-defense. He should have died. Instead, he wakes up to a glowing blue screen. Borrowed Time System Activated. Remaining Lifespan: 45 Days. Every cruel act steals days from his life. Every genuine act of kindness earns him more time. But there is one catch... The system cannot be fooled. Fake apologies, forced smiles, and charity done for selfish reasons earn nothing. The only way to survive is to become the kind of man Derrick has spent his entire life mocking.

Everyone thinks the God of War died 743 years ago. They couldn't be more wrong. He wasn't killed; he was erased. Ronan Ash has nothing to his name. No family to claim him, no rank to protect him, and zero divine affinity a crushing, humiliating void in a world where every other student at the Imperial War Academy radiates power. To everyone else, he’s a punchline: an orphan clutching a rusted sword with nothing but an F-rank future ahead of him. Then, the System wakes up. Welcome back, Host. You have been dead for 743 years. Suddenly, Ronan is haunted by memories he doesn't recognize, hunted by enemies he’s never encountered, and guided by a System that knows infinitely more about him than it’s willing to reveal. It speaks in riddles, hiding his skills and sealing away his true potential. But buried deep within its data is a ledger containing six names: the six beings who wiped a god from history to claim the world's thrones for themselves. They are still alive. They are still worshipped. And they are still watching. To find them, Ronan must climb from the absolute bottom of a world that has already forgotten his existence. To defeat them, he will have to evolve into something even the gods feared. And to survive, he’ll have to demand an answer to the one question the System refuses to touch: Why was the God of War erased, and what was he truly becoming?

Felix was one of the best elite special ops soldier in the world and now he is reincarnated as a bookkeeper with a trash ability in a Esper filled world which thrives on the rule of the strong prey on the weak, when he is give a nameless book by a mysterious stranger, he gains a system and finds out that his supposed trash ability is actually a powerful ability above the SSS rank so now he is determined to find out the truth about the parents he never knew and on the way he meets powerful people and the mysterious stranger who introduces him to a whole new world of adventure and danger. "This is a message for Dawn".

I am Kava, an ordinary person as usual. I'm not the chosen person by the system. One day, I got a lot of money. I went to a cafe to celebrate with my sister, Mika. It was then that we came under attack from a chosen system user. I lost the fight and my sister was taken away. I found a Florine system bracelet and I put it on. However, that's not a combat type system and I wasn't chosen. Even the system guide insulted me. What do I have to do to be able to use the system?

When a sudden supernatural storm wreaks havoc on Griffin City and releases mysterious monsters from portals, Mason risks his life while trying to save his foster brother, and fails, but is beaten to death by a bully. At the brink of death, he awakens a system through an old necklace given to him by his father before he and Mason’s mother were killed by a shadowed figure during the first occurrence of the same storm that dawned on their city ten years ago. The system grants Mason the power to respawn after death infinitely, yet his power is mocked as a useless one by those who also awakened superpowers during the storm. However, there's more to his powers than he even knows. With the system, his abilities are limitless. He decides to groom his powers when he sees his potential and fights against the monsters that appeared from the portals. In the long run, as he unravels his powers, he becomes a prize for envious power hungry supernatural beings he never knew existed and decides to hide behind an alter ego known as “Devil's Spawn”. He joins the secret Protectors’ Guild to protect innocent citizens when he realizes that his foster family have no way to protect themselves. Things take a turn when his foster sister goes missing. He goes in search for her and crosses paths with the shadowed figure that killed his parents again. His memories are triggered and he's hellbent on knowing who the shadowed figure was. Revenge becomes his game. However, he soon realizes that there's more to the supernatural storm than it meets the eye. Will Mason choose revenge or to save the world from the hidden dangers lurking behind the portals?