Ab Aeterno

Unspeakable Hermione Granger goes back in time on a sanctioned mission to save Harry's parents and give him the childhood he deserves, but a meddling House-Elf sends her back to 1977 instead. She has Minerva and Albus on her side, and befriends Severus, Regulus, Remus and Lily, and eventually gains the trust of the Marauders. Can she stop the war? HG/RB, HG/JP, LE/JP, LE/SS, RL/SB