Rain King
He never promised her anything more. He did not even promise her this. But Ginny has been poor her whole life, and she knows how to make do. So if her first time is not what she thought it would be, if there are no flowers and no candles, if there is nothing but herself and Harry and cold stone; still it is enough. Ginny knows better than to want what she can't have. Ginny knows it's people that are important, not places or things, and she doesn't cry out, even though it hurts, even though there's no one to hear.
Harry is bigger than she thought he would be, rougher and more desperate. He smells of blood and dust and freedom, war and victory. And Ginny twists underneath him, pushes his hand where she needs it to be, and when she comes she does not think at all of gold and onyx and forbidden knowledge, parchment and ink. When she comes she thinks of Harry and not of Tom. And when Harry has to go she kisses him, and does not cry.