The Black Sheep and the Mad Muggleborn: a love story (гет)

"The fourth date was devoted to exposing Percy to as much of muggle culture as one could reasonably manage in the space of an afternoon, and the fifth was him getting his revenge by taking her on a tour of a tiny, obscure museum devoted entirely to the life of the Department of Magical Games and Sports’ former Head, one Argus M. Kettlebum, best known for being too fat to ride a broomstick from age six."
The one where Hermione and Percy bond over books, office space, and expensive champagne.