Tsukuyomi: Moon Phase Special
Japanese title: 月詠 -MOON PHASE- おにいさま, ゆらゆらきらきらどんぶらこ これって, なーんだ?
Alternative titles: Onii-sama, Yurayura Kirakira Donburako Korette, Naan Da?, Up and Down, in the Sun, Floating Away? What Is It?
Type: Special
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Feb 22, 2006
Duration: 23 min
Rating: PG-13 - Teens 13 or older
Studios: Shaft
Licensors: Funimation
Genres: Avant Garde, Comedy, Slice of Life

Omake Special from the final DVD volume. The Special storyline has very little to do with the original series outside of having some of the same characters, and has a completely different storyline which does not fit into anything which came before it.

(Source: AniDB)