The pacing felt a little off at times - choppy bits of transitional dialogue, and extra comics that interrupted the main storyline at dramatic points and in ways that didn't quite seem canonical? I enjoy that type of content, but they fit better as extras at the end if they're really just side jokes. (Like Kakeru looking for Yamato in the bath when as far as we see, they don't actually bathe together during the trip, since the whole idea makes Kakeru inexplicably anxious.)
I was kind of expecting the surprise friendship between Yamato's sister and coworker to go somewhere, too...what's the whole deal with his sister's crush on Kakeru anyway? Is she planning to actually confess? The timing has definitely passed on that one now, so I'm not sure why the plot point even came up.
Most of this volume takes place during Kakeru's and Yamato's 3 day school trip to Kyoto. I did ultimately enjoy it a lot, but it definitely gets stronger near the end. Some of the other bits felt sort of like filler or were a little awkwardly drawn out...like Kakeru plopping on top of Yamato in his futon while the teacher's doing bed checks. A decent idea, but it felt like it got kind of unwieldy on the page, and needed something else to balance it.
The ending was great, though - I ugly-cried through basically everything after Fujino pulled his big surprise. And I was NOT expecting to get a new favorite character out of this - usually I'm annoyed by the sudden introduction of New People several volumes in, but right now I'm kinda hoping for a Hosaka/Amamiya spinoff? Hosaka is...weirdly cool. He's blunt and not diplomatic at all but is actually super intuitive and great at giving advice. If Yamato would let him, they could be pretty decent friends, I think...and he and Amamiya were so unsurprised and so supportive when they figured out what was really going on with Yamato's feelings towards Kakeru.
Honestly, with how dense and avoidant and frustrating Kakeru was being throughout this volume, I was almost (gasp) starting to root for possibly-also-gay-Hosaka to heal Yamato's heartache instead, but he and Amamiya have an interesting dynamic I'd like to see more of.
And Kakeru is, possibly, starting to pick up the slack in his relationship with Yamato. I liked the little glimpses of Yamato's past (is his dad still around?) and Kakeru finally cluing in on what he's known all along - that Yamato is really, really good at hiding his feelings and what he truly wants, and part of their friendship involves Kakeru being good at pulling that out of him.
He did a good job of that with correctly identifying Yamato's desire to go on a side trip during their Kyoto free day, but he spent so much frustrating time talking himself out of thinking Yamato really wanted to spend time with them. Hopefully now that Yamato has actually confessed - although a bit more physically than I was expecting - maybe they'll make some actual progress and Kakeru can stop being such an intentionally oblivious idiot.
Looking forward to seeing where we go from here!