Just Another Fangirl {5SOS Fanfiction}

Calum Hood had no idea what he was getting himself into when he offered to look after a family friend for the summer. That family friend, however, turns out to be his aunt's friend's 5SOS obsessed daughter, Riley Ammer. But what happens when this little annoying 15 year old turns out to be more than he thought she was, but they start to run out of time? What will they do when Calum finds a secret too terrible for their friendship to bear?