Here on Kellychambliss's rec in One Bad Man. Great story. I love your gruff-yet-kind Millicent, your perfectly IC Snape, and young Creevey who is sheer perfection.
The stories you don't tell (McG's Knickers? Reverse Starfish?) are tremendous fun, too.
And underneath there's the grimness of the post-war world, and the various hurts and warts of your characters. Great job.