The opening theme song by Aoi Yuki with “Eternal Labyrinth” while the ending theme song “Ai no Himitsu” will be performed by several of the main voice actresses.
Sentai Filmworks picked up the rights to the show recently and has it set to stream viz Anime Strike for the fall season.
The manga has been serialized on the Niconico Seiga site since summer 2015 with it getting three print volumes so far.