Hard to tell whether the series got axed or if Koruse just decided to end it. She powered out the first couple of volumes in basically a year, but it took her another year to get this one out. And she's been doing doujinshi stuff on the side, so maybe she just decided to call it. It feels like the story could have been 4 or 5 volumes though, and felt less rushed/fleshed out some more of the backstory.
I hope it was her choice, but we may never know. Thanks everyone for reading along, support Koruse by buying some physical volumes or something from her Fanbox if you can!