Her Guardian Demon (Black butler fanfic)

This is my first fanfic so please be nice. I love the idea of Ciel Phantomhive having a sister that was separated from him during the fire. If you don't then i'm sorry for your loss. THIS IS A ROMANCE/ ACTION STORY AND I WOULD LOVE HELP AND SUGGESTIONS. DISCLAIMER: I DO NOT OWN THE CHARACTERS IN THE BLACK BUTLER SERI...