An ordinary schoolgirl named An has always dreamed of a fairy tale romance and finding her own prince charming. Her life takes a sudden turn when she discovers a mysterious book hidden in her school library. Upon opening it, she unknowingly breaks a seal and releases the characters of Grimm fairy tales into the real world.

Suddenly, her everyday existence is overtaken by strange encounters with enigmatic hunters, dangerous wolf-like figures, and other unsettling beings drawn from stories she thought she understood. Each of these characters carries their own motives, and not all of them are safe. As An is pulled deeper into this fractured fairy tale world, the line between story and reality collapses, and her idealistic notions of romance become something far more dangerous.

The story blends school life with dark fantasy, building a tense atmosphere where obsession, desire, and survival intertwine. The cast is composed of morally ambiguous characters, and every encounter carries the potential to rewrite the ending of the tale. The narrative is driven by An's struggle to navigate this new reality where classic folklore is reshaped into something unpredictable and often unsettling. The series is created by manga artist Yasuo Isanami, known for reinterpreting folklore through modern settings with psychological tension.