Harry Potter and Defeating Dark Lords, Inc

A child left with abusive muggles is no way to prepare him to defeat a returning dark lord. Or any others that might pop up. What happens with a small change, and abuse is reported to someone in authority? AU Lunar Harmony, plural relationships, no lemons or anything like it! See further warnings inside. Harry/Hermione/Luna, Neville/Susan/Hannah, Sirius/OC