What do you think of this storyline?

This is my storyline:
The main character is a teenage vampire. Her parents were killed by werewolves. Now she lives in a "foster care" for mythical creatures. Her best friend is a human guy. She gets picked on by the popular kids. She lives a fairly normal life until her foster mother adopts a werewolf. Then she bans together with a few other vampires to try to destroy the werewolf. Then the werewolf calls in its family to do the same to the vampires. Then it turns out that her friend has fallen in love with the werewolf.

I'm also thinking about the main vampire accidentally killing one of her friend's close relatives, making him lean closer to the werewolf.
What do you think? :/ I'd really like comments and suggestions, please.