What if Severus was a marauder? what if Harry had a twin sister? What if she could never use her magic? What if that was proven wrong years later? What would happen after that fateful Halloween? Humor me and try the prologue, it explains better than this

Songfic to For Good, just a little thing set in mostly Harry's 5th year about a possible relationship between Harry and Luna. It's pretty cute, at least to me it is.