One of the three albums that accompanied the release of Ar tonelico: Melody of Elemia, and one of the first set of the Hymmnos Concert series albums, this CD contains all of the songs sung by Akiko Shikata and Yuko Ishibashi, who serve as the Hymmnos Singers for Misha Arsellec Lune and Claire Branch, respectively. It also contains the opening theme to the game, Singing Hill - Harmonics EOLIA -, and four bonus songs, one vocal and three arranged instrumentals, that aren't in the game.