I'm Yours (1/3 of Niall Fan Fic)

Grace is a diehard fan of One Direction and when they do a signing in her home town, she happens to receive the number of the one and only, Niall Horan. Her boyfriend has cheated on her, her father is a maniac and Niall seems to be the only thing going for her.
Throughout the story, we get to see the Griall relationship grow and grow, but when One Direction have to move away from Australia and back to London, will the relationship continue to grow?