Definitely one of the more abrupt mid-chapter cliffhangers so far, but what can you do. There were definitely some cute moments though. I like the random student who just so happened to knock Hina right into Ayumu; their yuri comedy of errors moments are always fun lol
Also cool to see another mention of Hina's brother. Since he sent her a message in chapter 8 about visiting, I'm guessing he'll show up in the near future. I wonder what he'll think about her situation with Ayumu. Will he be supportive like Ayumu's mom, or against it? It'd be interesting if he maybe had better been able to see past Hina's mask than Asuka or Ayumu (at least before she let it drop a little last chapter) and thus be able to see how much getting to know Ayumu has already changed Hina
I'm still also scared about how this entire story is gonna play out because of who the author is. But right now I really love this a lot lol.
Assuming you're just talking about their previous manga, I really can't see Confessions having the same issues as Best Friend. Ayumu and Hina are already better at actually communicating than Minami and Yuzu were for 99% of that manga, and I'd even say they've already made more progress towards getting together than those two had by Chapter 10. It'd be even harder to force the same kind of last second drama when one of them is already very open about her feelings and the other is showing signs of returning them even sooner. It's not impossible I guess, but I'm not particularly worried