An Anime Must Watch: xxxHolic
Anime/Manga Obsession: xxxHolic by CLAMP
Volumes: 18 in English that I have found, but the story continues. I’ve read more online.
Anime: Available on Amazon for digital download. 12 episodes, English sub/dub.
Movie: A Midsummer Night’s Dream (2005)
Tsubasa... Look into xxxHolic and you’ll run into this title.