Fairy Navigator Runa

Fairy Navigator Runa (妖界ナビ・ルナ, Youkai Navi Runa) is a children's novel series by Miyoko Ikeda published by Iwasaki Shoten. It was later adapted into a manga series by Michiyo Kikuta published in Nakayoshi by Kodansha and licensed by Del Rey. Publication was taken over by Kodansha after the second volume of the manga was released by Del Rey.

Plot
Luna Rindou is a klutz who loves to daydream and relies very much on her best friend. Her greatest treasure is an amulet that once belonged to her mother. One day, she runs away only to have the amulet stolen by a boy and girl who turn into animals when they come into possession of the amulet. What is the meaning of this!?