This latest chapter reminded me of the book Sideways Stories from Wayside School, which I read when I was in elementary school. It's about a school that was built sideways and the antics its kids get up to.
I love the more abstract chapters, but I think the simple ones like this one that just show Shijima getting a bit less cold (ironically) and aloof are also very important, and of course it's just really cute to see her and Majime getting closer. I wonder if the sudden snow is an effect of Shijima's sister's new mysterious contraption.
Are that beer can and that donut stuck to permanently stuck to the heads of the teacher and Sumida now? Probably not, but I wouldn't be surprised either way. I really hope to see this animated someday.
By the way, the mangaka panpanya makes short stories with a really similar vibe to this series. An Invitation from a Crab is a good collection that's available in English.