I can't read the moonrunes, but judging by the circumstances of this doujin, one of the people who got turned into a Demon ultimately didn't like it very much, so the lead Demon turned them back into a human offscreen and let them resume their normal life?
Because if that's the case, hot damn Taku keep churning this shit out. All the fun of tailphagia vore but in a non-fucked-up narrative.
I really want Taku's stuff to be translated into English. I think of any of the artists out there, Taku's works are the ones I most badly want translated. It is such a shame how little of them actually are.