The 2-CD album consists of a disc containing Masami Okui's singles collection starting with her out-of-print first single up to her 8th "Mask", and another disc containing self-covered songs which she originally wrote for other srtists. Disc 1: 15 songs including "Dareyorimo Zutto", "Yume ni Konnichiwa", "I Was Born To Fall In Love", and more. Disc 2: 8 songs including "1, 2, 3", "Sennichite", "Rinbu", and more.