Claire, a young vampire whose greatest passion in life is sleeping, is banished from her noble clan by her grandfather after he decides her constant lethargy is an embarrassment. She is cast out into an unfamiliar, untamed forest with nothing but her desire for rest. Rather than panic or struggle to survive, Claire simply curls up and continues sleeping, unconcerned with her new surroundings. During her slumber, she happens to encounter a legendary monster, a Fenrir, and casually makes it her kin—not for power or protection, but simply because she wants someone to talk to. When the Fenrir evolves after receiving her power, word spreads through the forest, and a growing number of monsters begin to gather around her, each seeking to become her servant. Over time, while Claire sleeps, the monsters develop the wild forest into a thriving community, eventually turning it into a full-fledged monster kingdom. The humans on the edge of the forest notice the disturbance and begin to investigate, setting the stage for encounters between the peaceful monster nation and the outside world. The story follows Claire's perpetually drowsy daily life, her evolving bond with her loyal monster followers, and the gradual expansion of the nation that grows around her without her active involvement.