For the record, this series was in fact axed. Mikami Teren is quite well-known for creating poly yuri -- in fact, both of his very first two yuri doujin novels ended in poly, and his most successful series (Watanare) has also explicitly committed to poly as of the end of "Season 1" (volume 4 of the LN, with more to come).
(His first two doujin novels):
https://www.amazon.co.jp/gp/product/B075CW11WT/
https://www.amazon.co.jp/gp/product/B079DRMPGY/
This series, Moshikoi, was cross-promoted with Watanare's manga adaptation on Niconico.
https://seiga.nicovideo.jp/watch/mg472312 (Watanare chapter 1)
https://seiga.nicovideo.jp/watch/mg479226 (Moshikoi chapter 1)
https://seiga.nicovideo.jp/watch/mg625852 (Moshikoi chapter 15)
You can see signs of why the series was axed in the view counts. Moshikoi started off well, with 90k views, a bit more than 1/3 of Watanare. By chapter 15, Moshikoi only had 15k views, 1/6 of how it started.
For all the posters who are upset by a rare series with clear poly development not delivering, consider voting with your wallet then next time you encounter such a series. Incidentally, Watanare is still ongoing.
Mikami Teren's second most popular series, and his original breakout doujin LN that got him publishing offers to start doing commercial yuri, is Arioto, which isn't poly. Personally, for this series, I was routing for Sayo more than Rinna, so accepting that it had to be axed, I'm satisfied with the ending. Of course, I did buy all the volumes.