She was a witch, only Olivia Charles never got the memo. Having never received her Hogwarts acceptance letter, Liv grew up concealing her magical abilities. Until, one day, she steps through the Leaky Cauldron's doors on a whim and into a world of enchantment, dark lords, and guys on flying motorcycles. Trouble and tomfoolery abounds, and also something greater than all magic.

She was not who he thought she was: Slytherin, conniving, and deceitful—but otherworldly, small and gentle, with kind eyes, a strange affinity for flora, and an ache for adventure. Oh, and his brother's girlfriend. Awkward.

She was there when he had killed all those people. And now she's found him, traced straight to Grimmauld Place, seeking vengeance. But when the truth emerges what remains is something more than vindication, but the deepest of all magic. Sirius/OC.