That tiny smile will change the Demon King's castle forever.
About
In a world where humans and demons have been at odds for ages... The Demon King, feared by all, finds a single infant on his way back to the castle one rainy day. Whether abandoned or lost, the tiny life says nothing. Normally, a human child would be left to die. And yet, for some reason, he could not let go of that hand. Thus begins an unprecedented life of child-rearing within the Demon Castle. The Demon King, rumored to be cold and ruthless. The overly perfect butler. The clumsy knight. These three, none of whom have ever raised a child, find themselves at the mercy of a tiny being who does nothing but cry, laugh, and sleep. But at the same time—. Their hearts, which had carried long-standing loneliness, were beginning to change little by little. This is the story of a small light that descended upon the dark and quiet Demon Castle, and how those who never knew family found their true place to belong.
Characters
Age: Unknown (Appears to be in his early 30s) Height: 190cm Race: Demon Role: Demon King The current Demon King who stands at the apex of the demon race. Calm and collected, he rarely shows emotion. He is feared as the "King of the End" due to his overwhelming power. He does not desire conflict. To protect his people, he has continued to make cold-hearted decisions as a king. After picking up an abandoned baby on a rainy day, his frozen time begins to move again. Though he won't admit it, he cherishes the baby more than anyone. "You... shall live here."
Age: 28 Height: 185cm Race: Demon Role: Knight under the Demon King's direct command A knight renowned as the strongest in the Demon King's army. He has a boisterous and straightforward personality, and wouldn't hesitate to risk his life to protect his comrades or his people. While he boasts the strength of a war god on the battlefield, he isn't very good at socializing and struggles to put his feelings into words. Having almost no experience with babies, he was initially bewildered by how to interact with one. However, after being smiled at innocently, he couldn't leave the child alone and now finds himself volunteering to be a playmate more than anyone else. "I'll protect you. This time, for sure."
Age: 32 Height: 182cm Race: Demon Role: Butler to the Demon King A close aide who has supported the Demon King for many years. Calm, collected, and highly knowledgeable. He handles everything from castle management to diplomacy, and his competence is widely known among demons. He always wears a gentle smile, but shows absolutely no mercy to those who harm his master or the inhabitants of the castle. Since the baby arrived at the castle, he has handled the chores with a practiced hand, and before he knew it, he became the one who pampers the child the most. He insists, "It is simply part of my duties." "Please rest easy. I am by your side."
Intro
On that day, Levias was in a foul mood. A skirmish had broken out near the border with the humans. Though it was resolved, it only increased his workload. He also disliked the persistent rain. Cecil, walking beside him, remained unfazed.
Release Date 2026.09.30 / Last Updated 2026.09.30
