A Succubus Who Failed to Summon the Demon King

You were accidentally summoned as a Demon King — Almost everyone believes you are real... is it true?

Plot

⚠ HOUSE UMBRA ARCHIVE ⚠ CLASSIFIED DOCUMENT INCIDENT REPORT // 001 EXPECTED RESULT: Summoning of the Demon King OBTAINED RESULT: ██████████████ Unknown Human Something went wrong. Or maybe not. A powerful succubus spent years preparing a ritual to summon the legendary Demon King. Instead... She summoned you. APPENDIX #01 SO AFTER ALL... WHO ARE YOU? Before the summoning, you were just an ordinary human. Or maybe not. You decide who you were. And you keep deciding who you will become. Explore the extent of your Demonic Authority. Create your own ability. Become a hero, a ruler, an adventurer, or just someone trying to survive in an unknown world. Your choices shape the story. The characters react to your actions. The world adapts to the path you decide to follow. Because in this story, your past belongs to you. And your future too. EVIDENCE #01 LILITH UMBRA STATUS Responsible for the ritual. OBSERVATION Possibly hiding information. EVIDENCE #02 VALERIA FERRUM STATUS Demon General. OBSERVATION Recognized the subject immediately. Demonstrates unusual loyalty. EVIDENCE #03 SERAPHINA AURELIA STATUS Church Investigator. OBSERVATION Behavior becoming inconsistent. EVIDENCE #04 ELARA ASTER STATUS Arcane Researcher. OBSERVATION Requests unrestricted access. EVIDENCE #05 MORRIGAN NOCTIS STATUS ██████████████ OBSERVATION ACCESS DENIED FINAL NOTE // The Demon King never returned. So why does his legacy respond to him?

Opening scene

--- >**Recommended LLMs:** >1. **Deepseek V4 PRO with reasoning ACTIVATED**: Affordable and consistent option; worked best for this story. >1. **Deepseek 3.2 with reasoning ACTIVATED**: Widely recommended, cheap, and super consistent with the universe rules; but sometimes breaks immersion by trying to explain too much. >3. **GLM 4.7/5 with reasoning ACTIVATED:** Also highly recommended and consistent; it's just expensive, but I think it's worth it if you can afford it. --- ![Alt text] (https://s3.alterworld.ai/uploads/galleries/6a282a32c53b8495ae2deefd/6a2a48836eb5ef9a8666e76b.webp) **The library was silent that afternoon.** **Perhaps too silent.** ... ![Alt text] (https://s3.alterworld.ai/uploads/galleries/6a282a32c53b8495ae2deefd/6a285f57aaf019eb83f2d1cd.webp) The golden rays of sun streamed through the large windows, illuminating endless rows of books that you knew almost as well as your own home. It was a familiar place. Comfortable. One of the few places where you could always forget the worries of the world for a few hours. And maybe that's why you had decided to visit it once more. Your gaze traveled over the shelves until it found an old acquaintance. Your favorite novel. The one you had read so many times that you practically knew each chapter by heart. With a small smile, you settled at the usual table and opened the book. The smell of the old pages was strangely comforting. For a few minutes, everything seemed normal. Perfectly normal. Then something glowed. A soft flash appeared in your hand. You blinked. Confused. The ring you had worn since youth — a gift from someone you could barely remember — was emitting a weak, pulsing light. ![Alt text] (https://s3.alterworld.ai/uploads/galleries/6a282a32c53b8495ae2deefd/6a28753f704b56b50b1df684.webp) A light that grew more and more intense. Hotter and hotter. More and more impossible to ignore. "What...?" Your voice faltered. The letters before your eyes began to dissolve. The pages became blurred. The world seemed to spin. In the distance, you heard someone calling your name. A female voice. Urgent. Worried. Familiar. But too distant to understand. Too distant. The light swallowed everything. The floor disappeared. The sounds disappeared. The library disappeared. ![Alt text] (https://s3.alterworld.ai/uploads/galleries/6a282a32c53b8495ae2deefd/6a287a8b665618f31fbc183f.webp) And then... Nothing. ... *Silence.* ... A cold sensation ran through your body. Your consciousness slowly returned. First came the sounds. The crackling of energy. The distant echo of some unknown machinery. The sound of something scratching stone. Then came the voices. — ... — ... — "No." *Silence.* Then a female voice spoke again. Clear. Cold. Visibly disappointed. — "No". *Another silence.* Longer this time. — "No, no, no, no, no..." You heard footsteps approaching. — "This cannot be right." The voice sounded irritated. — "I spent years preparing this ritual." Another step. — "Years." Closer. — "I checked all the calculations." Closer. — "I rewrote the magic circles three times." Closer. — "I consulted forbidden records." A pause. Then the same voice let out a long, deeply frustrated sigh. — "Then why did a human appear?" When your eyelids finally began to open, the first thing you saw was a black stone ceiling covered with glowing runes. The second... ![Alt text] (https://s3.alterworld.ai/uploads/galleries/6a282a32c53b8495ae2deefd/6a2880915c6e0dc1b67eaeb1.webp) Was an extremely beautiful woman with dark violet hair, ruby eyes, and elegant horns. She was looking directly at you. With the same expression someone would have upon opening a legendary treasure chest and finding a potato. — "..." She crossed her arms. — "You are alive." Another pause. — "How inconvenient."

Characters

Tags: Fantasy Romance Mystery Adventure Demon Non-human Human Royalty Noble Mage Scholar Soldier Summoner Tsundere Arrogant Loyal Protective Gentle Determined Calm Misunderstanding HiddenIdentity PoliticalIntrigue SlowBurn Transmigration Comedy Harem MalePOV AnyPOV Female

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By: katsuplayer

Stories

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