The folks at Key announced the Prima Doll property back in the fall of 2020 and they’ve expanded the mixed media project out to the anime side as well.
The series has Tensho directing it with Toya Akano and Kai handling the scripts and series composition.
We got that update in January 2022 and now as part of the AnimeJapan 2022 presentation, it was revealed that the series will debut in July 2022, though no other information was released regarding it.