https://twitter.com/inushins/status/1316994581083299842
So according to some japanese reading people, the artist says in the tweet that the original plan to continue under a different publisher (that he announced those 2 years back or so) was in the end cancelled too.
But now he plans to resume the story through a web serialization.
I really hope that he manages to get it running again.
Also, this thing is really good, it deserves being more popular. Would be great material for anime too.