There are very few fics out there where Harry lives in Godric's Hollow, and there are even less fics where he lives there together with Ron, Hermione and Luna. I liked this original idea!
I loved your take on Luna! You have her character nailed down to the original! Amazing!
Then there is the plot. It's so Harry-like that he is all full of compassion and wants to help Snape so badly that he does something with his powerful magic that even he himself doesn't understand. It takes Hermione and Luna (a really perfect duo!) to explain the meaning and consequences to him. That's so canon! :)
And I loved this part here:
"So," Harry said. He shrugged. "I came close." His face got very warm. "I mean, I've done a bit of snogging, anyway, how different could it be." Quite different, his brain screamed. "I'm only eighteen. I've been busy. I'm not scared to try it, whatever it is."
Buaahhaha, that is a version of naive!Harry I just love!
The interaction between Harry and Snape is great as well! Snape is very IC here, in my opinion. I love direct!Snape. And a Snape who is a bit into dirty talk... my, that's the epitome of hotness! Heh! :)
Ah and the sex scene is wonderful! Erotic and sexy and hot!
The way Snape keeps telling Harry that he doesn't love him, but on the other side he doesn't mind kissing and sleeping with him, that's so completely Snapish!