When I saw your face, I fell in love~One Direction FanFic

Summary:
Charlotte King is just an average high scholar with a normal life and a weird sister, named Angelica, who obsesses with One Direction. Her parents leave to go on vacation together in Japan, while Charlotte and Angelica have to stay at home. Angelica has her birthday party and is giving tickets to go backstage with 1D, but her fathers insists that Charlotte goes with her. She bumps into someone by accident, and opens her eyes to see a beautiful, green-eyed boy with brown curls, who happens to be Harry from One Direction. What will happen when they begin to have a 'thing' for each other?