Seonghwa and San have been dating for a while, they were both open to adding another person. They ran into Wooyoung both San and Seonghwa fell in love with Wooyoung. Later that night San and Seonghwa went out for blood, yes blood, they are vampires but wooyoung is to be turned into a vampire by them. They saw a shadow in the ally, the shadow turned out to be Wooyoung. what will happen after they save Wooyoung