Fics like The Duality of Numerology

A procrastinating, middle-aged Albus Dumbledore and an anxious, reluctant time-traveler Hermione Granger are presented with the Sorting Hat's swan song. The hat sings of darkness, magic, and two sets of star-crossed lovers. The pair must confront their pasts and futures in order to save what was lost: Hogwarts and the magical world.

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