Disclaimer: Harry Potter is owned by JK Rowling et al. Any characters or locations you recognise are the intellectual property of these individuals and corporations. I make no money from the writing of this story.
This story was written for Round 3 of the Quidditch League Competition on ff.net. The prompt for the round was: Choose a pairing of two Slytherins -keep it rare! A rare-pair is defined as any pairing that has less than 2,000 stories in the archive under the "Romance" genre, including M fics. This pairing had seven stories using those guidelines which I think qualifies.