18 parts Complete @RomanceeeeDrarry has given me permission to finish this fic on my account as the previous author is no longer able to finish it. If you haven't read the first 20 chapters, you can find that here: https://www.wattpad.com/story/32640436-sex-magic-drarry.
Summary: In Harry's seventh year, an unexpected subject pops up on his schedule. Pre-HBP AU.
"Sex Magic", Harry/Draco, NC-17
Title: Sex Magic
Author(s): VelvetBlood (chapters 1-18), Leo_draconis (19 and 20), and ki_rivers(21-35)
Rating: NC-17
Disclaimer: I own none of the characters, Hogwarts, or anything resembling JKR's work.