Ai Yori Aoshi: Enishi - Miyuki
Japanese title: 藍より青し～縁～ Miyuki
Type: Special
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Dec 31, 2003
Duration: 15 min
Rating: PG-13 - Teens 13 or older
Studios: J.C.Staff
Licensors: Funimation, Geneon Entertainment USA
Genres: Comedy, Drama, Romance, Ecchi
Demographics: Seinen

Ai yori Aoshi: Enishi - Miyuki is a 16 minute Christmas special set before the beginning of the first season. 

Based on manga chapters 43-44 and would also fit as episode 21.5 of the first season.