San is the vampire prince, he's the most powerful and well known vampires of human and vampire kind alike

But a long time ago his kingdom suffered, humans hunted them down, trying to drive them to extinction.

Years passed, and few vampires were left, San was one of them. One dark full moon night he was walking down the city streets when he saw you, Wooyoung; another vampire just like him.

You were laying on the ground, he could tell you were in pain.