Sin System: Demonic Harem After Reincarnation

All August has ever wanted was to become an employee in the biggest conglomerate in the country, the Arizona group, in order to prove his worth to his demanding girlfriend. Fate played an unusual twist when he was dumped on the day of his interview by his girlfriend for the owners of Arizona Group. While in shock, he got into an accident. Just when he thought he would breathe his last, he got the trillion-dollar system! A system that allows him to make a trillion dollars, which was worth five times the Arizona Group! How will he make those who looked down on him pay after getting his system? Read in this intriguing System book on how a pauper rose to supremacy!

🏆 No.1 book of "The Ultimate Fantasy" Contest 🏆 Alucard was an ordinary high school student who just wanted to graduate quickly and find a job, but one day, a strange incident happened that made him transmigrate to another world. A world where magic and other powers are everywhere, a fantasy world. Beyond expectations, in a new world, Alucard had to lament the bitterness of life because he was banished, deceived and even wanted to be killed, but who would have thought that behind ordinary strength, Alucard was a god that people feared, a God of system analysis. [Ding!] [System activated!] [Welcome back, lord Alucard!]

Kicked out from the Walter Family mansion, fooled and betrayed by his wife, then murdered by a ruthless loan shark, a revenge system gave Leo Sebastian Holland a new life. As the son of the world's richest family, Leo discovers the Walter Family is a member of The DID drug cartel — he must destroy the world's most powerful drug cartel to destroy the Walter Family. However, the real Leo shows up mid-plan to exact revenge on him. Leo Sebastian realizes he has a complicated identity-swapping situation. How will Leo complete his revenge plan? What will the real Leo do to make his plan fall apart?

Meteors hit the earth and unleash destructive monsters. Suddenly the selected humans got an extermination system. Humans who receive the gift of the system must protect other humans from attacks by increasingly crazy monsters. But can they defend the earth from looting monsters?

Elliot Kane is a scrawny, introverted college freshman at Crestwood University, relentlessly bullied by the campus elite: jocks, frat boys, and social media influencers who thrive on his humiliation. One night, during a particularly brutal encounter that leaves him battered in a dark alley, a mysterious cosmic anomaly binds an alien neural entity to his mind: the Death Mind System. This system grants Elliot a chilling power: by knowing a person’s true name and whispering their death in his mind, he can kill them instantly, their body collapsing as if their soul were snuffed out. No evidence, no trace; just a thought, and they’re gone. But the system isn’t just a weapon; it’s a living, evolving intelligence that feeds on death. Each kill upgrades its capabilities, unlocking new mental abilities: telepathic manipulation, memory siphoning, even glimpses into the victim’s final thoughts. The more Elliot kills, the stronger and more addictive the system becomes, transforming him from a timid outcast into a calculating force of vengeance.

After discovering the secret of the rich and why he was forever humiliated amongst his peers, Stan Gibson decided to leave the school made for the rich and elites back to the streets where he belonged. But on getting out, he was attacked by a group of tugs. At the blink of death, he was found and possessed by something called ADOTH. ***** “Adoth, what did you say you were again?” He asked with so much curiosity. [I have been called many names by different species in the universe, more often I was addressed as a system, so I guess you can call me that too. My aim which I already told you is to help my host save their planet from destruction but they have all failed in the planets which I’ve been to and now earth is next and it is up to you to save it or watch it being destroyed.]

An adult computer programmer Rin has himself transported to another world after having a lucid dream. Starting from nothing, he uncovers that he can use the world system and is able to use a powerful magic called star fall that destroys everything around him and makes him gain lots of experience causing him to level up at high speed. He becomes more magic as he travels and meets lots of girls who will play significant roles in his life in this new world.

Devansh Magnus is a broke university student, a walking tragedy, and worst of all—the infamous "Leash Lover" of his department. He had spent his days chasing after Aranya Sen, worshiping the ground she walked on, doing anything to get her attention. But in the end, what did he get? She crushed him like an insect. Kicked him aside like a stray dog. And just when he thought life couldn’t get any worse—Ashen Graves nearly sent him to the afterlife. Now, standing in front of a vending machine with an empty stomach and emptier pockets, he dug around, hoping for a chump change. Nothing. Except for one single, 4ucking useless coin. He stared at it, cursing his pathetic existence. Then, out of nowhere—he just started laughing. The kind of laugh that wasn’t funny, that teetered between despair and insanity. "This is it? This is all my life amounts to? Hahaha... Fuck my life." And then—something insane happened. [Ding! Suitable Host Detected...] [Synchronizing Thoughts… The Host’s Personality Meets the Criteria for Fusion…] [Ding! Initiating Fusion…] [Ding! Fusion Complete.] [Counter-Love Wealth System Successfully Activated.] Devansh’s eyes widened as the information flooded his mind. '99 TRILLION' in wealth. More money than he could ever dream of. But there was a catch—he could only spend it on beauties. And if he successfully countered a love attack? He’d get back 10% of what he spent, plus extra rewards. For the first time in his miserable life, Devansh grinned. He had begged. He had suffered. He had been used and discarded. But not anymore. Now, he would bind those untouchable women and turn the game in his favor. He wasn’t chasing anymore. Now, they would come to him.

Damn! Life just dealt Ashton Myers a bloody good hand. Getting dumped by his lover, Ashton experienced a life-threatening accident. When Ashton awakened, he found himself connected to the Reality-Changing System.

When a cosmic event called The Reset merges the digital and physical worlds, chaos consumes Earth. Each human receives a “King System,” granting unique abilities and the chance to become a ruler in this brutal new hierarchy. Leon Vale, a 26-year-old mechanic and outcast, awakens to find his system inactive. Mocked and left for dead, Leon discovers his “broken” system hides a forbidden protocol: the ability to absorb and steal the powers of other Kings. Armed with this gift — and a vengeance born from betrayal — Leon sets out to hunt the new Kings. Along the way, he allies with Iris Kade, an ex-soldier with a loyalty-based combat system, and forms a ragtag empire of survivors. As Leon’s power grows, he learns of The Architect, the entity behind The Reset, and uncovers a secret war between divine factions using humanity as their testing ground. From the ashes of civilization, Leon must decide: will he become humanity’s savior, or its final tyrant? The answer will shape the new age — and crown The Last King.