That was very sweet. The sudden happiness where Harry threw back his head and laughed kinda messed with the vibe of the story a little bit though. Maybe it would be a smoother transition if he gave a short bitter laugh or maybe a small smile. I think if it were a bit longer it could be even better. You could really set up the scene (describing the scenery, location, and apperance of the characters for example) and try to make the scene flow better. Luna's character kinda threw me off too. Like how she went from her usual self to what would seem to be a line from any other character. Good luck and keep writing!