Perfect Harmony {Niall Horan Romance}

When I first saw him didn't know what to think, but something about him was so interesting, I could see me and him being best friends, the kind of friends that finish each other's sentences.
Lia and Niall have been best friends since they were 5, the day they met, was the day they became inseparable, but then Niall leaves for X Factor and forgets her, she was broken.
A year later, she auditioned for the show that stole her best friend and she won, her first single had to be a duet, the words that came out of her mouth was "I want a duet with Niall Horan"
What will happen to their lost friendship? Their friendship was like a perfect harmony.