Black Deer in the Moonlit Medow

(Y/n) is a young 16 year old girl with an achoholic father who killed her mother. After running away she meets a black deer who ends up being a demon her mother sent to protect her. What will she do when she runs into many problems along the way like her father, other demons, dangerous people, and even her own feelings? Where will this fairytale from Hell go?
Credit to my friend @Maliffic1725 for the wonderful cover photo! The photo belongs to her!