I'd guess the big reveal if this were a full series would end up being that Sabbath cares less about the food and wants the demons defeated and humans protected. When he's finally the last demon, the MC would be forced to fight him and Sabbath would turn out to be the only demon "ingredient"...
This author's style seems to be telling a story from the MC's perspective, then reexamining it in the next chapter from the POV of whichever other character was the most involved.
So much of the story is centered on Nanami's weaknesses and Kaoru helping her to overcome them by finding the strength to trust others and to be more confident in herself.
While you can certainly debate how effective it has been and how heavy-handed the author's use of the trope was, I would...
Well, they've already established that cross-dressed Kaoru looks like his mother, so obviously his dad will have memory damage and the only way to calm him down and start helping him to heal will be for Kaoru to impersonate his own mother and flirt with his dad.
If I had to guess—based on many years of anime and manga—only one female student will. She'll be the one who sat atop the food chain of the high school as the strongest fighter, and is madly in love with the MC because either (a) he was the first person in her life to treat her as a girl...
I'm gathering from the other chapters—which have a tendency to tell the story, then show the same thing again from another character's perspective—that it is just the author's style.
Yes, yes, very cute, but—as someone who wears glasses—I can't imagine just slapping my hands onto the lenses like that. The rest of the date would just be a blur (and not for romantic reasons!)
Yeah, I get the impression that the Demon King spent his final power restoring the Hero who, in turn, could not bring himself to return to the humans. There may have been some clues in the original Japanese that didn't translate well, but it definitely doesn't have a "double suicide" feel to...
@Gagweeb & @Mimik - Amduscias (the music judge) conforms to a not-uncommon trope in manga of characters who look and are generally treated male, but view themselves as female. It's more than just being a cross-dresser or gay, but I'm not sure it's quite the same thing as what we consider trans...