You were raised by ghouls your whole life, being sold to ghouls constantly, your current owner Sire brought you to be in a circus act to preform fighting and hard tasks. You just wanted to be free and were wishing you were dead, until that night at the circus a young boy about your age (19 In the story just you're 2 months younger then him) catches a glimpse of you and feels something he never had before, you seem odd, and it makes him curious. Him and is partner were investigating the circus anyways cause it seemed VERY suspicious of ghoul like activity. So he decided to see what your actions would be towards CCG officers.