I'm pretty sure this story was on Hex Files, but I can't find it.
Post-Hogwarts I believe.
Draco's a veela, scented out Harry as his mate but instead of going to Harry directly
went to Snape, who went to Dumbledore. Dumbledore lies to Snape and Draco, telling them
he spoke to Harry and Harry rejected the bond, when in fact Harry has no idea.
Draco goes on a potion to suppress the longing, but a rescue missions organized by Lupin and Harry
to save Snape and Draco lands our boys in a safe house where the truth comes out. They, of course, bond.
Blah, blah, blah revenge, necromancers, Mpreg, and a temp cease fire with Voldemort. Please help.