flumpool announced today that they're no longer part of A-Muse & have gone independent by setting up their own company
However they still entered a business alliance with A-Sketch which's owned by A-Muse
https://natalie.mu/music/news/434999
https://www.flumpool.jp/news/17284/
A lot of artistes in recent times have left A-Muse so not surprised flumpool is next :s
Then again flumpool had been with A-Muse since 2003 & at least they still maintain friendly relations with them , for now