And it wasn't just the dorm she was leaving. It was Hogwarts. Everything she'd dreamed about, everything she'd ever wanted - now she had to leave it all behind. The world was waiting - and everything they'd been holding out on, every decision, their whole future - it wouldn't wait any longer. And she wasn't ready. James/Lily fluff, really.
Everyone knows what James Potter and his friends get up to. They've been kings for four years, bullies that everybody seemed to adore anyway. But this year, OWL year, Charlotte isn't about to let them ruin her exams. Nothing James Potter does will get to her this year. Next Gen.