Based on what's been said by some of the LN readers here, we're not even halfway through the original story, so there are still plenty of twists and turns to go. I'm still convinced Mai is true endgame (sadly, as I much prefer Renako's and Ajisai's dynamic as it feels a bit more... earned, I guess I should say?), but there is no telling what will happen in the interim. For all we know as manga readers, Renako could break up with Ajisai in a month due to self-imposed anxiety of dating the girl she pretty much praised as a god. Or she will find some way to settle into a three-way romance with her and Mai, who knows? I know more than a few here are really gunning for the poly ending. Or maybe none of that happens and she ends up choosing a mystery third girl that shows up two volumes later.