Title: Like Sand Through Fingers
Author: xenadragon_xoxo
Other pairings/threesome: None
Rating: PG-13
Word count: 18,000~
Content/Warning(s): Language
Prompter/Prompt: No. 21 from suitesamba: Harry's been an Auror for five (or more) years when the new Director of the MLE reviews his files and realizes he never earned an O.W.L. in Potions. Harry is forced to go back to Hogwarts and take 7th year Potions - with Professor Snape. Snape can also be headmaster, or not, but I'd like to see grown-up Harry in class with Hogwarts' best 7th-year Potions students.
Summary: When the new Director of the Department of Magical Law Enforcement finds out that Harry never achieved an O.W.L. in Potions, she takes him off Auror duty and sends him back to Hogwarts to take Seventh year Potions. Harry thinks it can't get any worse, but then he finds out that the Potions teacher is still Snape.
A/N: Thank you so much to my beta for getting all this done despite having a last-minute life thing crop up! And thank you to the prompter for such an interesting prompt.

Read on AO3

(Like Sand Through Fingers)