Sin System: Demonic Harem After Reincarnation

When Arthur was humiliated and beaten, he had only one thing: the system. This system, granted by the Goddess Alice, was not meant to save the world, but rather to build a harem and amass wealth through lewd quests. From intimate touches in the library to breaking into the Immortal realm in other worlds, Arthur had to embrace his deepest desires to reach the pinnacle of power. Arthur must conquer all rivals, Gods, and his creator goddesses, while maintaining the loyalty of his ever-growing harem. Will he become a hero or a monster driven by lust?

A flower shop owner drowning in debt keeps receiving messages from a number called "The System." When a mysterious woman hints that the invitations are real, Muneer wakes up in a game with six strangers. All of them are good people. All of them need money. The System's first test is simple: work together and everyone wins, or betray each other and only one walks away with the prize.

Leo was typical, overlooked and completely unprepared when a forbidden tome chose him and gave him the mark of a Warden and placed him under the Mage Academy. This school is an intermediary between worlds, a training ground where recipients of a gift of a System Interface, called a Codex, are trained. However, the file of Leo himself is empty, his Codex whispers that they are “unfinished,” and the elite at the Academy are watching him with suspicion and fear. Dropped into a realm of magical rank and fatal challenges, Leo is an exception. His magic is not dead, but a forbidden energy, which develops by consuming the magic and memories of others. In a maimed mentor who has an overabundance of knowledge, a genius competitor with a cursed lineage, and an ally with a talent to outwit the street, Leo discovers a rot inside the Academy. It is not merely teaching magic, it is harvesting it, it is tapping its students with the souls of its former students to feed its immortality, all managed by an enigmatic, manipulative Headmaster. As the boundary between the magical and the mortal realms collapses, Leo gets to know the horrifying reality of his destiny. He is a “Fractured Soul,” a descendant in an intergenerational cycle, who will either redeem the world or ruin it. In order to escape the cycle, he should learn how to overcome the same force that is eliminating his human nature and face the most outrageous truth of all: the man who has tortured him is his own father. The world has become the teacher, but Leo now has to rewrite the final lesson. Tags: Progression Fantasy, Academy Fantasy, Gaslamp Fantasy. Underdog Protagonist, Magical School, Forbidden Magic, System Interface, Conspiracy, Found Family, Cyclical Destiny, Tragic Romance.

Ryan King had it all: billions in the bank, the city’s biggest company, and a beautiful wife. But in one rainy night, he lost everything. Betrayed by his wife and best friend, Ryan was left paralyzed, a prisoner in his own body, forced to listen as they spent his money and plotted his murder. For six months, he was a vegetable. A silent witness to his own destruction. Then, they made a mistake. They killed him. But death wasn't the end. As his heart stopped, a blue light pierced the darkness. [SYSTEM ACTIVATED] [HATRED LEVEL: MAXIMUM] Ryan wakes up with a second chance and a mysterious System that grants him god-like abilities in exchange for one thing: Vengeance. Now, the man who couldn't move a finger can control technology, crush bones, and manipulate the stock market with a thought. He won’t just take back his company; he will burn their world to the ground. They thought he was a broken shell. They are about to find out that they just woke up a monster.

After losing his job and dignity, loser dropout Amar Pradana is struck by a mysterious truck only to awaken as the host for Astraeus, a disgraced God of War. Trapped in a world of secret divine vessels and deadly conspiracies, he must navigate the Cosmic Retribution System which grants him power only through the humiliation of his enemies. With an unpredictable goddess watching his every move, Amar must prove he is more than just a vessel for the heavens' most hated deity. This is the story of a man whose absurdity and luck might just bring the entire pantheon to its knees.

Sardat Vettel is an errand boy for the Skull Gangster, who always has his pride trampled on. He rose from adversity after getting the Spin System. [Spin system installed! Today's Spin Prize....]

Rocky Kennedy, started to get insulted by all his family when he was completely bankrupt and his company was mortgaged. No one was able and no one wanted to help him because his company was a big one and when he went bankrupt he really didn't find anyone willing to help him. His company went bankrupt because of a virus spread by his business enemies. Until finally he also found out that his fiancée betrayed and had a relationship with his business enemy, Gerry Foorgan. Rocky is completely devastated to realize that everyone is really mean and a jerk to him when he is poor. Until finally he had an accident and was hospitalized, as soon as he woke up suddenly a voice was heard. "I am the most powerful system in the world that will give you wealth and great abilities. Rise to the top! I will give you wealth, repay all your heartache to them!"

When pharmaceutical genius Dr. Alex Chen dies in a lab explosion, he awakens in the body of Xiao Feng—the "useless" third young master of a declining cultivation family. Crippled meridians, endless humiliation, and a legacy of betrayal await him in the ruthless world of immortal cultivation. But Alex brings something no cultivator has ever possessed: modern scientific knowledge that transforms ancient alchemy into an unstoppable force. Bound to the mysterious **Revenge System**, he's compelled to settle every grudge from his host body's tormented past. Each completed mission unlocks devastating alchemical formulas and forbidden techniques. Where others see mystical pill recipes, Alex sees molecular structures. Where masters take decades to master basics, he revolutionizes millennia-old practices overnight. **"Impossible! How can a cripple create Heaven-grade pills?"** From the scheming cousin who sold him out, to the corrupt elder who murdered his friend, to the demonic lord who destroyed his family—every enemy will face his calculated wrath. But as Alex climbs from the sect's bottom to the realm's peak, he discovers the System's true purpose isn't justice. It's harvesting. Armed with explosive compounds disguised as cultivation pills, poison antidotes that shouldn't exist, and breakthrough elixirs that shatter natural limits, Alex must master both revenge and romance. The brilliant Mei Ling captures his heart, but can he trust her when everyone has hidden agendas? **In a world where strength determines everything, the strongest weapon isn't a sword—it's science.** Will Alex break free from the System's control and forge his own destiny, or will his pursuit of revenge consume everything he's fighting to protect? *Power. Revenge. Redemption. The formula for immortality has never been deadlier.*

Raphael Laurent, a handsome military engineer who lived in New York, died of overwork, and got reincarnated as a trashy third prince of Thaloria Kingdom, Third Prince Cain Vailtair Thaloria, in a mediavel world filled with knights and witches. However, he finds out he has a System that lets him access all modern blueprints from his previous life. He finds himself exiled by his father Alexander Cain Thaloria to the distant Frostmark Province, neglected by corrupt, negligent officials, and often overrun by wild shadow beasts and raiders from neighboring kingdoms. Will he take advantage of his System and turn the situation around?

Robert Adams, a 25-year-old divorced man with a four-year-old daughter, will have to work in Chicago with his technological advance system in order to create the largest American technology company with which to give his daughter a decent life. However, his path will not be easy since many of his inventions will touch the markets established by the huge transnational companies in the country, so it will be a fight between the old and the technological advance brought by Robert.