The highlight of this BL as a whole has to be Jiwoong, and while that may be biased, this is my review so I am going to be biased. He ate that vampire role up, given what he was which brings me in my 2nd point...
The story was...Below avarage, especially given the vampire idea, it could have definitely be written better, but also several plotholes and questions left unaswered, with a season 2 rumored this could change but I doubt it will so I stand my ground on this.
The music was good, but did not impress me alot.
Would still rewatch if I was bored one day and had nothing else to do.