Mistletoe Mistake (Larry Stylinson AU)

Like any cliche story, Louis and Harry meet at a party. Louis is just a little bit drunk and is Harry. Lets just say they get a little intimate. Oh well, they're both drunk so they won't remember, and even if they did, they would never see each other again. But what happens when they end up going to the same school? And Harry remembers and can't get Louis off his mind? Because it meant something to him. But to Louis, it was just a Mistletoe Mistake. Harry just doesn't accept that though, and he refuses to let Louis slip through his fingers.