Here is a brief overview of the game, via the companies:

Pocket Mirror: GoldenerTraum is a mystery horror RPG that follows the main character in search of her true identity in a bizarre and wondrous world. Focused on puzzle-solving and exploration, it immerses the player in its compelling narrative and story-driven progression with a cast of unique characters, beautiful visuals, and a stunning original soundtrack!

Pocket Mirror: GoldenerTraum is in development for PC. A release date has yet to be announced.