Koei Tecmo announced another Atelier game next to the Atelier Online, the Atelier Liddy and Soeur: Alchemists of the Mysterious Painting. The company already released the official silhouettes of the two main characters, Liddy and Soeur but nothing more known about the game, not even the platforms or the release date (but we sure it will be available on PlayStation 4 atleast and maybe on Nintendo Switch).
Until more information, please stay tuned.