Her Snake

Y/n is a 19 year old finishing up her seventh year in Hogwarts. She has a secret that most of the professors know about. She is the top of all of her classes. One professor she gets very irritated at is none other than Severus Snape. Always doubting her and giving her detentions for her 'attitude'. But what happens when trouble comes along?

Will the two start to get along or will they remain to irritated each other?

I do not own any of the characters. Also Dumbledore will be alive in this.