I don't usually read Harry/Luna, but I loved the way you wrote them here. In my headcanon, the way they acted was so in character for each of them, especially Luna. As...unique...as she is, she always struck me as the sort that would take things like sex as a matter of course. Just another part of an ordinary day. I love her saying, "You need comfort sex." That is just so...so Luna. I don't know how else to describe it. And of course, naïve, awkward Harry...I've never been a Harry/Ginny fan, and this makes much more sense. Well done. :)