This is based by a novel by the same title. I don't know much, but in the novel has 15 volume! 10 in Youkai Navi Runa first series, 2 in Youkai Navi Runa II, and 3 again is in Shin Youkai Navi Runa.

I like this manga because the character is wonderful and very different! Check the novel and manga, you will know the difference. Anyways, go to the story!

Runa Rindou is Densetsu no ko (the legendary child) who her father is a human and her mother is a fox spiritual. With Mokke and Suneri, her servants, they went to many towns to search for Yuukyu no Tama. They also met Tai Rindou, Runa's twins and Towako-sensei, Runa's former teacher. The adventure begins!

Ok, I think is enough. Sorry for mistaken text. I hope you will know who don't know. See you!