Vampire is isn't exist in Life. That what was Yunho and his little sister, Soo Yeon thought. 

They are evil creture according to the books, story, film they watched everyday and also their parents said so. 

But, until one night ... 

There is also/always but

They met it. 

There red crimson eyes with long sharp fangs

They see it.

White skin like the pure snow in winter and their smirking along 

They feels it.

The red wet muscle slowly their neck and the sharp fangs is biting their flesh

They scare it.

They remember it;

That night, Everythings changed.