Someone's Underground (гет)

In June 1998, Hermione Granger, brains of the Golden Trio and reputed brightest witch of her age, rejected an offered position with the Department for the Regulation and Control of Magical Creatures and for all intents and purposes dropped off the face of the earth. She has contact with one person during her absence, initiated due to the area of expertise this person has. She resurfaces in June 2001 having to adjust to life in the magical world again.
This is set in HP world with a couple of visits by Hermione to Sunnydale so you do not have to be overly familiar with Buffy beyond the premise in order to understand this fic, but as this fic starts in 1998 anything from the end of Season 2 of BtVS on is fair game as I do touch on actual episode events (BtVS relationship mentions below are just covering my bases of who Buffy was involved with throughout the series). The Angel spoilers will be very general and brief for Season 2 (Reunion 2x10), Season 4 (Faith’s presence) & Season 5 (Smile Time mention).
Nothing in BtVS-verse will be altered beyond perhaps some assistance from Hermione (magical or research), but barring little changes the major events will remain as they were.