@FluffyCow: since we know Shiho is in the anime and thus it will go further than just adapting up to when Yori and Himari start dating, I can't imagine the ending not being awkward since Shiho's storyline would definitely require a second cour to wrap up. I'll pre-emptively hope for S2 as well, though it's not like we aren't used to yuri anime adaptations doing the setup and stopping just short of the payoff, see YagaKimi as you mentioned and also AdaShima.