For You, Brother by Somewhere Nowhere Stale Result (Last seen: )
Sirius and Regulus switch places, after Sirius finds out Regulus betrayed Voldemort. When Sirius is killed in Regulus' place, the Black heir decides he'll pay back his brother's sacrifice however he can. When James and Lily die, that means taking in Harry Potter, his brother's godson. Can Regulus raise a baby Harry alone? Can he thwart Dumbledore's machinations?