Hermione finds a book in Grimmauld Place with strange ideas and traditions. 1755: Polina Malfoy publishes Traditional Britannia, A Return to Her Glory. A combination of traditional values and new customs meant to preserve blood lines, protect the magical word and promote the unity of Houses. Hermione asks Harry to try one. Chapter 18: Kneeling to a Lord

Sirius survives until the end of the war, but the war isn't ending with Voldemort's death. In a desperate attempt to save the lives of those they love and have lost, Hermione sends Sirius back in time. But the jump has unforeseen consequences, and things aren't as they were. Fem!Harry Pre-Hogwarts