My Boyfriend is a vampire

Few years ago a boy met a girl and developed a love for her,they made a promise that when they were older they would tell each other how they feel about one of the other as the girl was given a crystal pendant from him.

Layla a 17 year old who attended Raizen highschool with her best friend amy,enjoying her life with her friend but she is haunted by her childhood memories and tries to figure out who was that boy she met.

But one day a boy transferred over sea's enrols into her highschool and class,upon seeing him her memories about her child past begins to stir and in her childhood past she remembers making a promise with a boy.

Unknown to layla that his boy who looks familiar to her he is a vampire,but lurking in the shadows was a organisation who despises vampires and wants to get rid of them all.

So how will these two face the threat together once revealing their love to each other..