Dolores, a house-elf, was rescued by Sirius and went to live in his home as his house-elf. Gradually, Dolores realized she had developed complicated feelings for her master, but any feelings between a house-elf and a human were doomed to come to nothing...
I never expect a star to shine for me,
but surely it won't mind if I quietly keep it in my heart.
Very novel subject matter, good luck to the author.