Sin System: Demonic Harem After Reincarnation

Jonah never imagined his routine day at the office would turn into a fight for survival. When a mysterious infection turns his coworkers into flesh-eating zombies, Jonah narrowly escapes, only to discover a strange new power within himself: every undead he kills makes him stronger. In this gripping survival tale, Jonah must decide what it truly means to be a hero—and discover that even in the darkest times, family can be forged from the unlikeliest alliances.

What do you do when no one around you can be trusted? When the world turns its back on you? Can you fight them all—and win? I tried. And now… here I am. With two names. Weird, right? Ironic, even. But that’s my reality. Don’t ask how I got my name. You’ll find out soon enough. For now, just know this: I’m Gensei Haruto. The only human without a core. In a world where power defines your worth, I have nothing. No family. No hope. Not that hope matters—hope is a disease. But there's one thing I will protect, no matter what it takes. Even if it kills me. Even if I lose everything. I will grow stronger. No matter the cost.

Catching my girlfriend of four years was cheating on me, my heart didn’t just break; it hollowed out. I drank myself stupid trying to numb it, but alcohol never really does the job. Then, like an idiot, I drove home drunk and ended up crashing straight into a truck. On the brink of death, a demon appeared. She offered to save me and grant me power, so long as I gave her one thing in return: entertainment. Next thing I know, I’ve been blessed with a Charm skill. And as it levels up, life gets… chaotic. Suddenly I’m being chased by all kinds of women. As I climb the social ladder and build real influence, one goal stays burning in my chest: to serve the girl who betrayed me a cold, delicious revenge she’ll never forget.

Synopsis: System-Generated Success ​Leo is a man caught in the gears of a dead-end corporate job, barely scraping by with a bank account that reflects his lack of ambition. He is invisible, overworked, and consistently overlooked—until a mysterious, glowing interface flickers into his vision one Tuesday afternoon. ​It is the Prosperity Engine, a high-stakes System that doesn't just promise success; it demands it. ​The rules are simple: the System issues volatile, high-reward quests ranging from strategic stock market maneuvers to high-pressure business negotiations. Each successful completion yields massive financial gains and upgrades to his "Wealth Architect" level. Failure, however, means losing everything. ​Thrust into a world where money is the ultimate power-up, Leo must navigate the cutthroat world of global finance while hiding the existence of his glitch-like ability. But as his bank balance reaches astronomical figures, Leo realizes the System has a hidden agenda—and the price of becoming the world's richest man might be higher than he ever imagined.

Superpowers abound. Villains rule the world. A transmigrated dork that has absolutely no idea what’s going on. Strong-armed by the Superhero Enhancement System into the thankless job of endlessly performing good deeds in a world where such actions are often met with violence, Lucas Lynn doesn't have much choice in regards to using his supposed gifts. It’s bad enough having to pretend to be a supervillain, but how exactly does Boss System expect him to save the world with only the help of a homeless teen, a dog that’s smarter than he is, and a yoyo? Oh, just trick some supervillains into becoming superheroes instead? You make it sound so easy!

The story follows Lucian, a low-born vampire ridiculed for his inability to manifest basic blood magic. In a world where the Werewolf Hegemony rules the daylight and High-Vampire Nobles rule the night, Lucian is nothing. That changes when he "dies" during a wolf raid and wakes up with the Eternal Night System.

Bryan Grayson. An illegitimate son of the great Houston family in Alorea Nation, now finds himself on the streets with his mother. After being kicked out by the Houston, Bryan chose to join the Alorean Nation army as there was no company that accepted him due to the influence of the Houston. Bryan's story changed when on a mission he gets blasted by an RPG. He died a pauper.. but awaken a military god.

250 years after the Ascension wars that led to the destruction of the moon, unsealing the seals that hold the ancient substance of Nytherite that allowed humans to progress technologically, but soon became the object of doom, corrupting every non human life form into ravage and dominant beasts called Extremovores that forced what was left of humanity to flee the surface. Creating seven gigantic floating arcs as sanctuaries, away from the extremovores. Adam and his sister Eve, Identical twins born in the post-surface surciety where your genetic purity determines your worth, with humans devided into Pures, Transcendants and Outcast. Adam, as an outcast must navigate his way in a cruel world where he is destined to be stepped on and used as a comodity had a fateful encounter with a relic that changed his path. The primordial Beast System. He must use this power to awaken his pottential and earn a place in a cruel world

Orphaned teenager Lucien is stuck at the early stage of 1-star the weakest possible shattering his dream of becoming an elite hunter. But when a rogue hunter corners him and his best friend, a hidden power awakens: The Phoenix System. Sealed within the pendant from his parents, it grants him strength beyond human limits and unveils a destiny greater than he ever imagined. At the Hunter Academy, as Lucien trains, completes quests, and battles through dangerous realms, whispers of an ancient calamity stir. The eternal war between the Phoenix and the Dragon threatens to consume the world, and in the shadows, a sealed entity of pure evil waits for its chance to break free. To protect everything he holds dear, Lucien must rise above his rank, master the four primordial energies of the universe, and decide the fate of gods and mortals alike.

"I'm a Summoner" - Ariana Ariana is a young girl who survived a great war after her parents and brother sacrificed their lives to save her. She then sees a Grimoire which makes her more powerful and seeks to become a demon lord. She now has to protect her country as well as the world at large. In this world, how will she be able to protect her country from other demons who plan on getting the Grimoire from Ariana? Join her on this magical adventure to enable her to protect her country.