Love from the Mayhem[5 Seconds of Summer FanFic]

Its about 5 seconds of summer having a 5th member. Like what? 5th member? How do you deal with it? This story is about 5 seconds of summer mainly about Luke Hemmings and the girl who made his world turns around again. It has a bit of Ash, Calum and Michael's love story, so actually this book is an all in one package...