The world has been ruled by Vampires for centuries. Vampires and humans have intermarriage and created a Vampire-Human hybrid. Since it has been centuries, it's hard to see a hundred percent human or a hundred percent vampire.

There's a myth that says, a hundred percent human's blood tastes sweet, sweeter than sugar and a bit alcoholic. If a vampire drinks it, both the human and vampire will have an unbreakable bond.

And a hundred percent vampire has a lot more capabilities than Vampire-Human hybrids. They have more than one power while Vampire-Human hybrids have only one power.

But you, you happened to be a hundred percent human, because your family, refused to have intermarriage with a vampire even after centuries. Making you, and the rest of your siblings, a hundred percent human. The one that these hybrids, call myth.

One, day, you met Lee Heeseung. Which you don't know, is a hundred percent vampire.