Under The Sunset Skies.

Kathryn blessed a fifteen-year-old girl who lives in a treehouse in the forest. Her stepfather hates her so her mother abandoned her when she was right just to run off with a man, and so she lives with her father who is a researcher of plants in the forest.

However, one day when helping a sick spirit and her family she meets a certain silver fox.

This book is a fanfiction of @Tamuna Tseveradze guardians of nine heavens books:

The guardian angel

The guardian spirit.

And the guardian demon.