Nebula's Civilization is a web novel about a South Korean office worker named Kang-Woo who dies in a car accident and reincarnates as a slime monster named Nebula in a fantasy world. After being adopted by a lonely dragon, he gains the unique ability to create and evolve a civilization. The story follows his journey from a weak slime to a powerful ruler as he builds a kingdom, recruits various creatures and humans, and develops technology, magic, and culture. Readers enjoy the novel for its satisfying progression and strategic world-building, as Nebula uses his modern knowledge to innovate and solve problems, the humorous and clever interactions between characters, and the blend of kingdom management with action and adventure as he faces gods and other threats.