Author teasing progress for 6 chapters and in the end it doesn't even matter…
I can't be too mad at that last chapter though because short coats that are still just long enough to completely hide the skirt and leave the illusion she doesn't have anything underneath is a huge turn-on of mine. Well, except for the part where she didn't do it to tease but did it by mistake. IRL that would be a huge turn-off, because that pretty much guarantees she is legally retarded. And then she can't consent so that'd be statutory rape.
For all the "welp, no progress" folks, note that Manabu doesn't lose his shit when he realizes what's happening here and Amano doesn't beat him in a coma when SHE figures it out. They're maturing. Frustratingly slowly, but it's happening.