One hundred years ago, aliens landed on a mountain near where a small, white five tailed fox lived.

After being stranded on Earth for one hundred years, they are ready for a test flight to see if they can return home.

In order to save the alien, the five tailed fox takes on the form of a human girl, and joins the school under the name of Yobi.

She grows more and more attached to humans and enjoys her time with them, until a fox hunter appears, as well as a shadow detective named Mr.

Yobi then allows for Geum-ee's departure back to the human world by placing her own soul in the bird cage.