Gust have released free story DLC for Atelier Sophie: The Alchemist of the Mysterious Book on the Japanese PSN during the Tokyo Game Show. This story DLC, titled “Sequel Episode” acts as a bridge between Atelier Sophie and the upcoming Atelier Firis, where Sophie will make a decision of some sort after reuniting with two of the game’s other characters. This story occurs after the main game in Atelier Sophie.
If you have a Japanese account and would like to play it now, it is available for PS4, PS3 and PS Vita.
Atelier Firis will be coming to the West in 2017. No word yet on whether this DLC for Atelier Sophie will see a Western release.