Wanted by the King of Demons. Demon Series, #1

Nessa Laveau was born into a prestigious family. Witches and warlocks were in her blood for generations. So, when she was accepted to Legendary Magic Academy no one was more excited than her parents. They didn't want to accept the fact that she was completely magicless. The only person who did accept her was her best friend Calen. A boy who mysteriously appeared one day when she was just six years old and never left her side since. When Calen found out that she was leaving for the academy he couldn't help but tag along with her and he was glad that he did.
Not only was she still magicless after three years of high school but she became the main target to all the bullies the academy had to offer. Then one day the school went into darkness and all the students were trapped inside the grounds with no way out. Screams and terror began to plague all around. Blood and sinister creatures tormented the living. They were searching for something or someone and Nessa had no idea that someone was her. Why were they after her? What was it about her that they would attack the school, killing innocent lives and caused all the adults to become possessed? And why was Calen acting strange when the darkness took over?