The legend of Kuzunoha the fox 葛の葉
The story is about a kitsune (a magical fox) who transformed into a beautiful woman and married a lord, Abe no Yasuna. They got a child, Abe no Simei who later became a famous ying-yang master (the Merlin of Japan) and lived happy until Yasuna discovered her, thus to save the life of her son she escaped without saying goodbye.
The point of the story is, she has always being a fox, she had born that way and she belonged to the wild. Kuzunoha shared a bit of her life/magicac with Yasuna and they had something beautiful together, however, the truth can not hide our true selves. Not even love. I believe we are all destined for something greater than our present (mean our 'right now') and no matter how comfortable we are, that truth is always there to remind us who we really are