Four modern young people accidentally broke an antique mirror of unknown origin and traveled to a different world called the "Mirror World" together with all the objects in the room. Trapped in a strange land, they get acquainted with the talking mascot 'Gulu', and discover that the way home is to travel through the four wonderlands and collect 'time and space fragments'. The team members cooperated tacitly, making fun and fighting monsters all the way, experiencing interesting and dangerous adventures, from chaos and disagreement to unity, and finally solved the mystery of the mirror world. Each character has grown, and humor and touching are intertwined. The story takes fantasy, adventure and friendship as the main axis. It is compact and exciting, yet relaxed and humorous. It is completed in one go with 1 million words.