Entanglements (гет)

Draco Malfoy, specialist in arcane spell work and a near-recluse since the end of the war, has been charged by the Ministry with investigating and putting a stop to a contagion that is gradually killing all life forms in the very old, magical forests of England. When he does not succeed, Hermione Granger, ancient potions specialist at the Ministry, is sent to the Manor to work with him. Will they find the answers they need in time? Will they find them at all?
Written for Round 9 of the Dramione Couples Remix. My chosen couple: Sarkan and Agnieszka, from the novel Uprooted, by Naomi Novik.
Couple History: A village on the outskirts of a vast and ancient wood is guarded by its resident wizard, a powerful and enigmatic mage called Sarkan, aka the Dragon. Every ten years, in a time-honoured ritual, he chooses a young girl of eighteen to come and live with him in his castle and serve him. After the ten years have passed, the girl is free to go. This arrangement is in exchange for the Dragon’s protection of the village from dark, magical forces that inhabit the wood. Now, spirited, intelligent, independent Agnieszka has reached the age of eighteen. She's definitely not the Dragon's type.