Posting here and on MF is a pain, so I'll be short.
It might not be a real Hina / Miki chapter at all. In the previous chapter Maria was on the cover, yet she had absolutely nothing to do with it.
It might be the same here. Let's not jump to conclusions, though I already wrote a little possible scenario on MF if it does end up being a chapter about those two.
And that's about all I have to say at the moment.