Maisie Wilkins and the Quidditch Key (джен)

Five years after the defeat of Voldemort, Hermione Granger returns to Hogwarts as the school's new Potions Professor. She's prepared to deal with trouble-making students, exploding cauldrons, and the difficulty of being less than a decade older than most of her students … but she's not prepared for what she finds in her classroom.
Why has Minerva McGonagall inveigled so many of her former students to return to Hogwarts as staff, this year of all years? Do the mysterious rumours about the dungeons have anything to do with the jinxed Defence Against The Dark Arts position? And can Hermione, Harry, Ron, Ginny, Neville and Luna unravel the mystery while steering a new crop of mischief-prone students in more productive directions?
What readers have said:
"Immensely enjoyable."
"Amazing work!"
and on ffnet:
"This is lovely. I feel like I'm reading another Harry Potter book."
"I adored this story."
"I just binged this whole fic in one go."
"Captivating"