 The album's composition was handled largely by Dai Nagao and Tetsuya Yukumi, both of whom were frequent collaborators with Hamasaki.Generally a rock-pop influenced album, Hamasaki said that the meaning of the album was itself a secret, and that it incorporated secrets she was keeping about herself that the public did not know.Secret had been announced originally as a seven-track EP; however, it eventually evolved into a fourteen-track album.