This was titled as an extra by the author instead of a numbered chapter like the previous 9 pages. I'm guessing that's because this ties into Ch. 36 instead of being a separate story like usual.
I just know that there will be a chapter that REALLY ramps up the content because I keep being hesitant on opening a new chapter of this. Tamer than I thought it would be but at least we get to see what her tastes are. Thanks for the translations.
So is the sister really getting down with the devil at this point or is it all in the doujin? Because the previous chapters (and even some chapters in the main story) imply that she and the devil are pretty close in real life