The festival might have been taking place in the underground. That would be a great way to finally bring in the SA cast.
I looked through the past and I saw that the author already included SA arc in one of his doujin book (not in pixiv). The preview is post #1485321. Look like none of the offline part has been scanned yet.
I looked through the past and I saw that the author already included SA arc in one of his doujin book (not in pixiv). The preview is post #1485321. Look like none of the offline part has been scanned yet.