@Superceller Huh... Well, as I said, not that I don't love them, but... Feels like in some of them there's "progress", but since it's an extra, is it canon? If it was one Extra every 7 Mains, sure, no problem. But it being 2 Extras every 1 Main...
The title of the first two-page extra – Setsubun – refers to a holiday in Japan. It marks the end of winter, hence Yamada's first line on the first page. She mentions futomaki. Ehomaki is a kind of futomaki eaten on Setsubun.