a single or as a promotional recording, recorded between the years 1998 and 2003. Six of the tracks on the album were composed and co-produced by Hamasaki, who used the alias Crea. The album consists of fifteen tracks, including two new recordings—"Rainbow" and a cover version of Japanese singer Yumi Matsutoya's 1975 track "Sotsugyō Shashin". Seven of the album's tracks—"Appears", "You", "To Be", "M", "Seasons", "A Song for ××" and "Who..."— feature new arrangements and compositions, while the songs "Key", "Hanabi", "Dearest" and "Voyage" are included with their original versions. Songs To explain Hamasaki's the background and development, Hamasaki hosted a commentary on her website. The first song, "Rainbow", was originally composed by CMJK, but Hamasaki felt the finishing product was "missing something", and re-worked the demo version with Japanese musician Dai Nagao. According to Hamasaki, she wanted to reflect the emotion and words used in each 100,000 messages she received from her fans to create the song, but because there were numerous emails, she decided to write it as a summary and her feelings as an "aftermath" from reading the messages. The song was described by a staff member at CD Journal as an "organic midtempo pop ballad" song. "Appears" was remixed by Japanese group HΛL. According to Hamasaki, she had asked the group to re-compose their original version of the track in order to reflect "current [musical] themes of 2003." The album included the original version of "Key (Eternal Tie)" as Hamasaki felt that the original was "more important and unknown" than the proposed-reworked version she had planned. "You (Northern Breeze)" was one of the last reworked tracks, and was described by Hamasaki as being influenced by Western music. "To Be (2003 ReBirth Mix)" was not re-worked or re-arranged by any of the album's collaborators, with it being purely remastered and mixed again by music engineer Koji Morimoto. "Hanabi" was one of the album's only tracks to appear in its original version, and has been described by a CD Journal staff member to have been inspired by Europop, trip hop, and dub music. "Dolls", a J-pop influenced pop ballad, remained the sophomore original track to make part of the record. Like "To Be", the next track "Seasons" was remastered and mixed by Morimoto. The final original track, "Voyage", was described by CD Journal as a midtempo ballad influenced by gospel music, layered with several string arrangements and other