(from ebookjapan):
It all started with a mysterious letter, scented with Chanel. Isabelle and Emily are close sisters living in an orphanage. One day, Gigi, the daughter of the famous French star Charlotte Jackson, comes to the orphanage to comfort her, and Emily, who is in charge of handing out flowers as a thank-you, is surprised to find that she looks exactly like Gigi. Isabelle receives a letter telling her that her real mother is Charlotte Jackson. Who are the sisters' real father and mother? Are they alive or are they dead? The work also depicts the struggles and tragedies of a surgeon in a time when science had not yet been fully understood.

Includes Contract of the Dead (死人契約, Shinin Keiyaku) in volume 1, and the title work of Blue Fox Fire (青いきつね火, Aoi Kitsunebi) in volume 2.