Mysteries: Legend of the bluebloods

She lost her parents at a very tender age. Left to be trained by her grandfather.

After they are mysteriously murdered by an unknown culprit.

Trauma haunts her for eight years, life becomes more and more unbearable to the point she becomes emotionless.

Things become more weirder and weirder. A photo of a missing dad, a blue hair, water turning to ice in school, and a school boy with an unknown history. What more could she ask for? Well, there was more coming for her.

What happens when she is attacked by a demon from nowhere?

And what is this I hear?

A blue blood?