Heartthrob with a cheeky smile (a Harry Styles x reader)

You love the band one direction, however there is one member who you've always liked a tiny bit more. What will happen when that curly haired cutie writes his phone number on the poster you only wanted signed? Will he become your friend or more than a friend or will you become mortal enemies? Will he regret writing that number or will he realize he just made the best decision ever?