The Great Demon System Wiki

My best friend and I signed up for the Dual Marriage System so the cancer wouldn't kill me. She and I managed to steal the hearts of the Hopkin brothers. Naturally, we became in-laws. Seven years later, my husband's son told me I was dull and useless. Meanwhile, my best friend's husband slammed her behind bars for the sake of his old flame. When she was released, the last thing she told me was, "Live on." Then, she rushed into the oncoming traffic and was crushed into a pulp by a speeding truck.

On the day I get released from prison, Joshua Caldwell's adoptive sister, Madeline Caldwell, hosts a live stream to welcome me home. She makes sure to shove the phone right in my face. "This is my older sister, Victoria. Even though she has gotten violated by 13 people, she still has the courage to continue living in this world." The comment section explodes instantly. Joshua frowns slightly, but Madeline merely sticks her tongue out at him with a cute smile on her face. Instead of going hysterical like I did three years ago, I just smile at everyone. "A woman's body is never her weakness. The offenders are the ones who deserve to die, not me." After returning home, I don't stop Joshua from letting Madeline visit our parents' graves on their death anniversary on my behalf. I don't mind Joshua giving my room away to Madeline and telling me to stay in the storeroom. Even when Madeline pushes me into the water once again, Joshua chooses to save her despite her knowing how to swim. After I get rescued by a passerby, I just go home on my own silently. Mixed feelings swirl in Joshua's eyes as he looks at me. "That three-year sentence has changed you for good, Vicky." I just smile softly in response. All I've done is finally see reality for what it is and not harbor any hopes for him at all. Moreover, the system, which I've lost contact with, has finally returned three days ago. It told me that it could take me home in seven days. But why is it that Joshua loses his mind after I've left this world for real?

The day my husband, Caleb Vale, buries his first love, Layla Shaw, he stands in front of me and throws our wedding ring into the sea. For the next 12 years, the breakfasts I bring him go straight into the trash, and the scarf I stay up all night knitting is tossed into the fire and burned to ash. The cruelest moment is when he looks me in the eye and says, "Aurora, if you really want to please me, you might as well go die." But when a mugger comes at me with a knife, Caleb still steps in front of me without a second's hesitation. As he lies dying in my arms, he uses the very last of his strength to force out a few broken words. "Go... I hope I never see you again in my next life." At the funeral, Helena Rogers sobs until she faints. "This is all my fault. I never should've arranged your marriage..." Everyone around us pities him and resents me. They whisper that I'm a jinx and wonder why I'm not the one who died. And honestly, I wonder the same thing. Why not me? After Caleb is lowered into the ground, I climb to the top floor of the building and jump. As I hover on the edge of death, a cold, mechanical voice echoes in my mind. "Binding complete. Wish detected. The system will now send you back 12 years."

What will you do when you find out a demon is after your life? April Greene, after being rejected by the 54th company she applied for was devastated and shattered. In the midst of her pain, she had an encounter with the demon after her life. An unexpected encounter, an encounter that unveiled th

Taking his place on the throne, the King crowned his golden girl his queen. I, on the other hand, was granted two choices—retire from court with a hefty fortune or be his kept mistress in the dark. Choosing neither, I hung myself on the clothesline right outside the laundress quarters. I had been sent back twenty years in time, tasked by the System to conquer four targets. I’d just blown the last target and my final chance to complete the quest. The System notified me that following the death of my flesh, my consciousness would return to the modern world, back to the arms of my family. Just as I closed my eyes, the desperate cries of my name caught my attention.

Liora An orphan with no memory of who she once was, Liora’s life changes the night a tragic accident rips her from the human world and casts her into a realm of ancient fae magic. Alone and disoriented, she awakens in a kingdom of glowing crystals and whispering forests, carrying only fragments of dreams she cannot place. Yet beneath her quiet confusion lies resilience. Liora is not fragile. The magic of this new world responds to her in ways no one can explain, hinting that her lost past may be far more powerful—and dangerous—than she realizes. Corin Corin is the warrior who finds Liora broken and frightened in a world that would have swallowed her whole. He becomes her protector, her guide, and the first person to make her feel safe. Their love grows fiercely and quickly—born from survival, trust, and shared hope. But their happiness is short-lived. When the Shadow Demon King rises, Corin stands between darkness and the woman he loves… and pays the ultimate price. The Shadow Demon King Ruthless. Cold. Bound to Liora by fate itself. The Shadow Demon King is her destined mate—and her greatest enemy. He seeks to destroy her kingdom and crush any weakness within himself, including the bond that ties him to her. Yet the deeper his hatred burns, the stronger the pull between them becomes.

I'm a succubus who gathers energy by clearing System missions, adept at the game of love. One day, right after completing a honey trap mission, I was sent to a SSS-level horror game at the very next second. The boss was invincible and bloodthirsty, watching coolly as other players rested in pieces before turning to the rest of us. "Now choose—how do you want to die?" While other players were wetting their pants and trying to find a loophole to survive, I picked up on something different. A handsome, powerful target beneath that cold, horrific exterior. Hence, when he reached me, I smiled enigmatically as I told him my wish. "I wish to be conquered by a truly powerful Entity, dominated from soul to flesh, and to die in pure ecstasy." I watched him pause in shock and added, "Oh, and you must do it yourself."

For her whole life, Lyra Suarez had been a good girl. That one girl who was too sweet, too nice, too helpful, too kind, too easy to manipulate, too easy to use, too easy to destroy. Being too pure and too caring sometimes has its bad side. And she knew that too well. At twenty-three, she was busy working her life away just to protect herself and keep her distance from her biological father, who never even claimed her.   With just one laced drink, her trust in her only aunt disappeared. Everybody seemed to see her as a beautiful ticket to a fortune. She was sold to a filthy old man.   While her poor soul cried for help, calling all the saints never seemed to work. And as her last prayer, in her most desperate state, she called for him... the Devil.   Because a deal with the Devil is always better than living in hell. And sometimes, the Devil is not the one to fear.

In the tenth year of my marriage to a genius pianist, I came down with a strange illness. A month ago, my husband missed my birthday party to care for his ailing sister-in-law. Night after night, I had waited for him to return home. But that night I forgot to wait at all and went to bed early. Half a month ago, he attended an important performance with his sister-in-law. I had always been petty and prone to jealousy, yet this time I didn't get angry. I simply went home in silence. Three days ago, I fell seriously ill with a burning fever. My husband rushed back from out of town in a panic—but only to tend to his sister-in-law, whose hand had been scalded. When we ran into each other at the hospital, I was strangely calm. I, who used to be fiercely jealous, felt nothing at all. I forgot the promise we had made to grow old together. I even forgot how he once fretted over me for days when I'd scraped a bit of skin. It wasn't until he said he wanted to bring his sister-in-law home and take care of her for the rest of his life that I—my memories riddled with holes—summoned the system at last. "I want to go home."

Mother, I have found the man I love - A beast! Duke Alaric - the only heir of his dead parents - was never meant to be loved. Tagged a demon right from his birth because of his very bizarre features and the circumstances surrounding his birth, he is locked away in the manor to live out his days away from the people. The same people who believe that to tame this evil from unleashing wrath on them, should be appeased with a virgin bride at every blood moon. Elisa, kidnapped from home, is the next victim of sacrifice to this blood thirsty demon, but what she finds behind the ancient and eerie doors of the suspicious manor is far from bloody and demonic. What did she find in this world of blood oaths, broken legacies, and forbidden love? And can an innocent girl born of betrayal tame this demon, or will she become the very power that destroys him?