Clearly you are not familiar with this author lol. Or the edgier works of Touhou.
Yakumi Sarai never fails to deliver. I wonder if the title refers to Meiling or Sakuya. Probably a little bit of both, with the part about peach girls near the end leaning it more towards referring to Sakuya. That is some classical conditioning Sakuya was banking on there lol. Associating her human scent with the food Meiling already liked to eat. Honestly Sakuya is scarier here than any of the youkai and only shows off more of how abnormal of a human she is. Normal humans are scared of the idea of being eaten. They are afraid of youkai. XD The irony.
The extra page at the end wrapped it up nicely. I wonder if Remilia wouldn't already find her appetizing, even just as herself.
I was thinking when I saw the cover page that Meiling's teeth looked unsettling. Turns out that wasn't accidental, huh.
Definitely on purpose. It's also part of Zounose's general art style for the youkai. If you look at some other works they've done, especially ones related to eating, the teeth of youkai when they're shown will have unnaturally geometric triangular appearances. And I'm sure in some cases, he adds extra fangs alongside normal flat human teeth, like he does here for Meiling, specifically to highlight inhuman natures.