kasodani kyouko (touhou) drawn by rakugaki-biyori

Artist's commentary

Original

・ヤマビコさんをZIPファイルでお届けします！その３

暖かくなりましたね。
と言う訳で、FAN BOXで投稿している「・お寺の前のヤマビコさん」を同人誌風にZIPファイルにしましたの第３弾です！
まとめて読みたいという方は是非どうぞ！

→https://yamabikokyouko.fanbox.cc/posts/9735862

ヤマビコプラン(500円)のご支援でその１・その２も合わせて同人誌６冊分読めますので、是非読んでみてください！
(FANBOXの”投稿”から”＃・ヤマビコさんZIP”で検索できます)

And if I'm machine-translating the description right, these are more of the collections of the FANBOX-only comic storylines mentioned in post #9177998. In fact, I'm now wondering if that's what post #8425621 is as well.

EDIT - And judging from both the robot and the word "yamanba" in the title of the one on the left, based solely on the first-panel previews that are publicly posted on pixiv, this is only one or two arcs behind the current FANBOX arc. Browsing through those previews should be enough to confirm that suspicion about the previous announcement, but I'll do it another time.