Miki finds out that Akio is Ends of the World, but I don't think he has any idea what actually goes on in that tower.

He's also mostly excited by the prospect of living that close to Anthy; in the short time he's considering that and what it would take to arrange things, he probably hasn't focused on the other people he'd be sharing the space with.

As an in-show fanwank explanation, anyway. More meta-ly, I'm inclined to write it off for the sake of humor.

(Or maybe Miki really is that perverted, Akio knows how to turn heads.)

Atropos wrote:

So, in Nanami's Akio car episode she says that she wants to move out of Akio's place to Miki and he says he'd like to live there in her place. This is AFTER Miki's episode, where he finds out exactly what kind of man the Chairman is.
Either this is a glaring continuity error, or Miki is just perverted.

I think it is safe to say that the entire Student Council, be they "sweet-mannered" like Miki, or "vicious" like Saionji, are all self-centered individuals who don't tend to think very far beyond their own interest throughout much of the show (with poss. exception of Juri's unexplained borrowing of sword to Utena), at least not up till Ep 37's friendship-confirming game of squash.  I see Miki's mind automatically going the "Ooooh-Anthy" route instead of the "Nanami in danger" route in that scene as part of his canon character reaction.