Despite having seen the screenshots yesterday, it took me a whole day to realize that this is a reference to TH17... RIP myself. Anyway pretty nice picture :)
I do kinda wonder if this is a literal case of a Beast that acts like a ONI-san.
Not just because of the weird shadow creature thingy but because of the Komarisa that is squashed having a paw print on it, and that without counting all the paw prints on reimu.
Fuck now I understand...I just don't follow touhou anymore beyond a few lewds from time to time, so it kinda flew over me the whole this being a TH17 nod since it's being released.
Yeah, I don't really follow the announcements, I play the games from time to time, but yukkuri are the most Touhou thing I follow. I discovered about TH17 only because the guy behind the Yukkuri Hakkei game retweeted the game's announcement (it's not released yet.)