That "nya" way off to the side is such a nice little touch. She says it to make the cat maid comfortable, but at the same time it's more of an afterthought because it's so strange. Love it.
This manga really should have stayed as a one shot. Which is something I hardly ever say because most of the time I'd like one shots to be more fleshed out in a serialization.
I'm hoping there will be some teacher and big bro subplots soon. Not that the main cast isn't fun, but its been a while since I've seen the aforementioned.