Japanese doujin music circle announced the release of their new album Ephemera on October 11, 2021 via their YouTube channel. They published a short teaser video and stated that the new album may be released in Winter of 2021.




[Update from October 20, 2021]:
Keisuke Kurose announced in a detailed posting on the circle's Pixiv account that the album is in the state of mixing with more news to be announced next month.
 


Source : https://www.youtube.com/watch?v=ApWrNQizy1c
Source: https://elfensjon.fanbox.cc/posts/2892414 (in Japanese)