Distant from the city of Seoul, there's a forest known as Blackthorn Forest. It's always been told that if you walk inside, you're never coming out... Now out of school and aquiring a thrist for adventure, a group of friends decide to head to this "forbidden" forest just for an adventure.Besides an adventure awaiting, what other secrets could await in this mysterious forest...?

Ever since she recieves an acceptance letter from the mysterious Black Star Academy, Han Hyekyung never could imagine what follows her arrival... Meeting vampires, werewolves, sirens, and many others, Hyekyung doubts the reason of her stay. But everyone has their secrets... Even ones that are meant to be discovered...