Volume 1 description: Jashin-chan, a demon from the underworld — known colloquially as the "Evil God Girl" — is suddenly summoned to the human world one day. The one who called her forth is Yurine Hanazono, a college student living in a run-down apartment in Jinbōchō. To make matters worse, Yurine claims she has no idea how to send Jashin-chan back to the underworld. Left with no other choice, Jashin-chan and Yurine begin living together under the same roof. However, since Jashin-chan can return...
This is basically an extreme otaku version of Tom and Jerry (or maybe itchy and scratchy). One girl's an amateur dark magician who summons a demon, the other girl's the demon who can't return back to the demon realm unless 1) they find the second volume of the spellbook with the go-home spell, or 2) whoever summoned the demon is killed. It feels like it'd be a pretty one-note premise, but there's a surprising amount of variety to the stories and the demon, Jashin-chan, isn't always trying to kill Yurine. I generally enjoy "wacky living situation" comedies and while the more slapsticky cat-and-mouse game is the high concept, they also give a lot of time to the slice-of-life aspect of these two trying to live together which is funny but also gives it a bit more depth than I expected.
I was admittedly kind of skeptical about the level 19 on this since it just looked like the sort of thing that would have a lot of jargon, but it's actually pretty spot on and the extent of the magic and demon related words generally isn't something I haven't already seen in Kuma Bear or the Kirby novels. The characters are more verbose than you usually get in manga, but the vocab and grammar are just fine if you've already got some light novels under your belt. It's not something I'd say is a great "first" manga, but it's solidly at my level with just enough new vocab and phrases to keep my on my toes. The only part of it I had a hard time getting was actually the bonus chapter, which wasn't so much because of the language as it was the joke being really specific anime fandom tropes that I'm not up on, but the rest of the gags were pretty enjoyable and it was an easy read overall.