As cute as it is....I just can't buy it. It's hard for me to see Kae-chan pressing the issue like that, when she hasn't done so about anything else in the original manga. I can see her asking in all innocence, figuring that was something Miyaji knew about, but then leaving it at that until events caught up with her. As for Miyaji, she really doesn't seem that easily embarrassed, especially where Kae-chan's concerned.
Maybe a similar story spread over about 12 pages or so?