A crossover with something I’ve never heard of. Can’t say I’m not disappointed.
The other thing kind of reminds me of Komi-san, which I am not a fan of. I’d rather have a normal chapter instead of this.
The crossover episode simply reminds us that the dark underbelly of Kanojo, Okarishimasu is a whole lot of enjo-kousai. There are hints about this dropped *everywhere*, but people simply choose not to talk about it in the main story.