This is a BGM pack for Atelier Firis ~The Alchemist and the Mysterious Journey~ that includes tracks from many previous GUST titles that you can choose under "Change BGM" option inside the Atelier.
In order to play with this additional content, it is necessary to first purchase game disc or full game from PlayStation®Store that is sold separately and update your game with the most recent online update. This program or data to be applied to existing program is only compatible with Asia version (official product) which is distributed by SIE or other official distributors. Compatibility with program or data from other region is not guaranteed.