X²: Double X
Japanese title: X² ダブルエックス
Type: Music
Episodes: 1
Source: Manga
Genres: Drama
Studios: Madhouse
Duration: 2 min
Rating: PG-13 - Teens 13 or older

X²: Double X is a short (two minutes and forty seconds long) prequel to the theatrical X film. It is a part of four music videos.

The first three are stills of CLAMP's pre-1994 X artwork and live-action sequences. The fourth is animated by Madhouse. Being the only music video that contains actual plot, the fourth video introduces some of the major characters and quickly lashes through the first few X manga (equivalent to X TV series episodes 1–3) which take place before the theatrical movie.

(Source: ANN, edited)