The manga series is known as Kyoukou Suiri in Japan and comes from Kyo Shirodaira with artwork by Chasiba Katase.
We learned in November 2020 that the winter 2020 anime series was getting another season, but it’s been largely quiet since then.
Kentarou Matsumoto is on board with the character designs and Brain’s Base is handling the animation production.
With Crunchyroll having been involved with the In/Spectre series in co-production, it’s been quiet since the show ended beyond Anime Limited picking up the UK home video rights.