The third of four animated CLAMP music videos. Others being Clover, CLAMP in Wonderland. This one is based on the manga "Wish".

"Wish" is about 28-year-old Shuichiro Kudo, a doctor who stumbles across Kohaku, one of God's angels. When he inadvertantly saves her life from one of the devil's servants, Kohaku decides to grant him a wish to repay him for his kindness. However, upon discovering that Shuichiro has no wish, Kohaku devotes herself to him, vowing to serve him until he has a wish that she can grant. However, both discover that there are some wishes that can't be granted by oneself.

(Source: Anime News Network)