It's about a girl who passed various assessments and became the 129th Guardian. She traveled through various worlds, corrected wrong plots, and fought against nightmares. The nightmares were fed by the world in the book. Every person in the book bound to her contract was just a container. However, the girl discovered a secret about the gods in the diary of the previous guardian. The cruel truth was that this was just a game played by the gods.
Purpose: to explore the truth of the world and the meaning of everything we do.