Ever since the release of "Byakuya Gensotan"-- main theme song to "Atelier Iris - Eternal Mana" released in 2004--, Haruka Shimotsuki have sung the main themes, inserts and other related songs for the "Atelier Series". The double disc album compiles her works from 2004-2017 including bonus tracks, pop songs, and ballads from her history with the "Atelier Series".