Hide and spy...okay that makes no sense (One Direction)

Crystal Stone, the girl that despises Harry Styles for his lack of humbleness (wait is that a word?) they meet and immediately Harry starts crushing on her..'because she's different' he says. After a lot of time, they eventually began having a love/hate relationship- well, only from Crystal's side. From Harry's side it was just love. One day she finds out that she a......'cue drumroll' yup! A secret agent.