"So, how is this on the smut-vs-story scale," I ask myself?
I open to a random chapter. I'm introduced to some odd fetish kissing involving some yokai or other's extra mouth, with character introductions so I assume these characters are just being introduced. After a few pages of introduction, it quickly devolves into sex. Then the camera turns to another pair watching them and they start getting frisky too.
Story content: None that I can discern.
Pretty goddamn awful XD Normally wouldn't the hentai tag be on for something like this? It's not like it's of any interest beyond that... Unless you're telling me the rest of the series is more substantive (which I would find... a little surprising).