For Hogwarts: a Regency Gamble
Hermione/Severus, about 4 years post-war, ignores Snape's death and the epilogue but otherwise fairly consistent with the events of DH. Characterizations vary, naturally.
Hogwarts is in financial trouble and a team from the Ministry - headed by Hermione - recommends a fundraiser, namely a Regency Week, since the castle's such an ideal site and the period is so popular.
The Regency period has been dear to me for many years, and finding a well-written modern Regency romance is a delight, especially with my favorite fanfic pairing.