Hazuki Kagimura is a socially awkward girl who has no friends; recently adopted, she also struggles to bond with her new family. Her only escape from this harsh reality lies within the pages of books, where her vivid imagination lets her live out fantasies of friendship and adventure, and especially when she feels alone and unheard today. One day, a mysterious old book appears in her backpack. While returning it to the library, Hazuki notices a familiar girl who seems invisible to everyone else but her. Choosing to follow, she is led into a hidden library where a world she once thought only existed in her dreams awaits. Märchen Mädchen chronicles Hazuki's encounter with Shizuka Tsuchimikado, her first true friend. She learns she has been chosen by the original print of Cinderella to become a powerful mage known as an Origin Master. Hazuki enrolls at Kuzunoha Girl's Magic Academy, where she overcomes her fears and believes in her power to write an extraordinary story and discovers a hidden talent that fuels her courage.