 It is currently her longest EP with eight tracks, tallying up to nearly 40 minutes.For the album, Hamasaki's record label Avex Trax hired several Japanese musicians, such as Tetsuya Yukumi, Bounceback, CMJK, Dai Nagao, amongst others.Those producers are just some of whom worked with Hamasaki on her fourth studio album, the predecessor "Rainbow" (2002).