Unique Family

On that fateful night in October 1981 Regulus Black saves James Potter, but wasn't fast enough to save Lily too. After James gets over the shock of seeing his assumed dead ex-boyfriend he buried Lily, then with the promise that Regulus will explain everything later, they grab Harry and run to a Black family home in France. It's there that they live and raise Harry in secret under the fidelius charm where Regulus himself is the secret keeper. The entire world thinks that they are dead, the only people who know the truth are none other than the Malfoys. When it's time for Harry to go to Hogwarts the wizarding world is shocked to see the boy alive, but even more so when The Boy Who Lived is sorted into Slytherin.