You are a detective who has been tasked with finding out the identity of the world's worst serial killer called "Ruby". Other detectives were also tasked to do this but only you have been successful at finding any leads. From your leads, you know that she is a female with black hair. You have just come across a dead body in an abandoned building and you are all alone... or so you think. Suddenly, you see a young girl who matches the characteristics from your leads. — Why hello detective...