Gotta say, Aspi’s argument on the resolution of the story sounds kinda dumb. He apologised because he did something wrong. Knowing why he did it, having an excuse at hand, understanding himself in the moment… I don’t think any of that matters. He understood Nayuki in that situation, and despite his feelings at the time, what he did was wrong. The apology may be at the expense of Yuuichi’s ability to excuse himself, but if Yuuichi is fine with it, surely we can be.
Oh, and on the topic of Akiko’s grasp of the situation… If she could guess Yuuichi’s 3-sizes joke, she can probably figure out their relationship. Nayuki is an open book, and Yuuichi’s standard behavior is so routine that a single change is very noticeable.
Someone said Ayu is the only heroine who is really noted to have disappeared, but Makoto gets the same treatment. It’s a better scene on a re-read, but there’s something there for Makoto fans.