Zero, My Vampire Knight

Amaya Hayashi is a student at Cross Academy. She is part of the Defense Committee along with Yuki Cross (her sister like friend) and Zero Kiryu (her crush). The Defense Committee is in charge of keeping the day class from learning the night class's dark secret. The night class is full of vampires.

One night while patrolling her area, Amaya come's across a girl crying. She'd been left behind. When she goes to comfort her Aido from the night class appears. He greedily drinks Amaya's blood, not a lot, but just enough to get a taste. He blackmails Amaya into swearing not to tell anyone what he did. What will happen when Zero finds out about it and things don't go well?
Will this fight against Aido bring Amaya and Zero together? Or will it tear them apart?
Read to find out :)