Shouta Aoi will perform the opening theme, while Nana Mizuki will perform the ending theme.
CLAMP originally serialized the shoujo fantasy manga in Shinshokan's South and Monthly Wings monthly magazines from 1990 to 1993. The sequel manga X began in Asuka Monthly in 1992 and went into indefinite hiatus in 2003.
Tokyopop published the manga in English from May 2004 to May 2005. Dark Horse Comics reacquired the rights for the manga and published two omnibus volumes in 2013.