Awkward little Neville Longbottom and Y/N, the golden girl of Hufflepuff. They've been just friends for years. And, technically, they are. At least, that's what Y/N tells everyone. It was her idea, after all. A secret little arrangement between two people who were tired of pretending they didn't feel something. They've grown up together at Hogwarts, survived exams and detentions, shared inside jokes no one else understands, and become the kind of friends who always seem to find each other in a crowded Great Hall. Which is exactly why no one suspects a thing. No labels. No telling anyone. No letting their friends notice the way Neville looks at her when she isn't paying attention. They could meet after curfew, disappear together between classes, steal kisses in empty corridors, and pretend none of it meant anything when someone else walked over. It was supposed to be simple. Just two friends who knew each other better than anyone else—and knew exactly how to make each other feel less alone. Except Neville made one tiny mistake. He fell in love with her.