TM Network
Yoshitaka Amano, the illustrator of the original novels, acted as character designer for the OVA. However, alternative designs were provided by Ashida (who also acted as the film's animation director), and elements from both artists’ works were combined to create final designs by the animators. Acclaimed pop artist Tetsuya Komuro was responsible for the film's soundtrack, and also performed the film's ending theme, 'Your Song', with his fellow members of TM Network.