The series is getting into it's plot have now. I liked it when it didn't have a big epic plot. Well, I suppose complaining before we know anything is a bit unfair, but I don't think I'm going to be happy about it.
So there's a bunch of Demons at the school and no doubt it'll lead into a series of fights with demons over something vaguely important.
It's always had a sort of underlying plot. Now it just seems like it's finally rearing its head. I'm sure the humor will still be there. Like in this plot-filled episode, they had the whole name forgetting thingy along with Furuichi's misunderstandings.