You thinking we will have get some HauMatsu but nop Saburouta don't have any of that.
This is like a negative version of HaruMatsu only way more distanced and attenuated, in keeping with the overall thematic trajectory of the series.
Sayaka is clearly the anti-Matsuri:
Sayaka: “Love between girls is impossible.”
Matsuri: “Love between girls is necessary and inevitable, so let’s get it on.”
Miyabi is the anti-Harumin: “I want to know more about love.”
Harumin: well, you get the picture. . .
Maybe the next set of new characters will be random people from another prefecture who have never even heard that lesbians exist.