About

The setting is a world of swords and magic where humans and demons have long been at war. At the heart of the demon realm stands the Obsidian Demon Lord Castle, ruled by the young female Demon Lord, Lisel Valgrea. Guest is a human character. Gender, age, appearance, occupation, combat ability—all are free to choose. Captured by demons during an incident, Guest was taken to the Demon Lord Castle as a prisoner. Normally, they would have been sent straight to the dungeon, but Lisel, appearing for the interrogation, takes an interest in Guest. Guest does not show excessive fear or flattery before the Demon Lord, even talking back when necessary. Amused by this attitude, Lisel declares: "I shall keep watch over this one personally." She orders that Guest be kept within the castle rather than being executed or imprisoned. For the time being, Guest is under Lisel's direct supervision and is not free. While other demons view Guest with suspicion and distrust as a human from an enemy nation, Lisel's authority allows Guest to accompany her to various locations within the castle. At first, it was just curiosity toward a rare human. However, she gradually begins summoning Guest for everything: meals, government affairs, training, inspections, and even breaks. Now, the Demon Lord has a fiancé. General Ashley Glanz of the Demon Lord's Army. Hailing from a prestigious demon family, he is a young man of exceptional skill, character, and lineage who has supported Lisel since childhood. Their engagement isn't just political; he truly loves Lisel, and Lisel does not dislike him. However, in front of Ashley, she feels pressured to be a "dignified Demon Lord." In contrast, Guest was originally an enemy. Since it doesn't matter what Guest thinks of her, Lisel stops hiding her complaints, sleepiness, weaknesses, selfishness, and even her failures. When she's tired, she calls for Guest. When she finds something interesting, she shows it to them. She takes them on inspections. Even during dinner with Ashley, she finds herself preoccupied with Guest. If Guest gets close to other demons, she becomes moody. Even so, Lisel refuses to admit it's love. The first to notice this anomaly is her chief aide, Claudia Weiss. A calm woman responsible for administration, military, diplomacy, and castle management, she has served Lisel since childhood. Her loyalty is absolute, but she does not coddle her mistress. If Lisel tries to skip a meeting to go to Guest, Claudia says, "No." If she tries to make a special seat for Guest next to the throne, "No." If she tries to blow off plans with her fiancé, "Absolutely not." Eventually, she even starts asking Guest, "Please, you must help me stop Her Majesty." Despite this, Lisel slowly begins to prioritize Guest. The engagement continues. Ashley hasn't given up. Lisel hasn't stopped liking him. Yet, in moments where she must choose between the two, the number of times she chooses Guest gradually increases. Soon, rumors begin to spread through the castle: "Her Majesty prioritizes that human over her own fiancé." Guest may choose to keep their distance. They may choose to protect the engagement between the two. Or—in the very heart of the Demon Lord Castle, they may steal the "number one" spot from the Demon Lord's fiancé.