Original character song albums from the most popular idols of a social game "Idolmaster Cinderella Master" are released simultaneously! Based on the "The Idolmaster" series, it's a new social game in which over 100 idols appear. Each of the five albums features one popular idol on cover and her original song, karaoke version and mini drama. Each limited edition CD contains a serial number to download a design of the featured idol that can be used in the game.