Brother, With a Band. (5SOS)

I don't know where this story will go, or where it will end, but Katie is Luke's sister. After being bullied by her brother, and his brain-dead, assholes of high school friends, he asks for a seemingly simple and manageable favor. If she accepts, she may be in for a whole lot more excitement, and adventure than what he thought was going to be a generic, going-nowhere, garage band.