Ancien to Mahou no Tablet: Mou Hitotsu no Hirune Hime
English name: Ancien and the Magic Tablet: Another Story
Genres: Drama, Fantasy
Type: ONA, Episodes: 2
Aired: Mar 10, 2017 to Mar 17, 2017
Studio: Signal.MD
Source: Original
Rating: G - All Ages
Synopsis:
The story will center on the adventure of Ancien, a girl that keeps appearing in Kokone's dreams. The story of the dream is one that Kokone's father told her as a mysterious fairy tale when she was little. 

(Source: ANN)