Another 01:
The comment someone made earlier about columns of boys and girls was interesting. I didn't catch it the first time, but the second time I watched it, I noticed how everyone in the class is lined up.
Another 02:
This particular moment didn't stand out for me until after I read the corresponding manga chapter, but when I watched it the second time, I noticed that the old lady who owns the doll shop specifically and clearly states after Kouichi wanders in that there aren't any other customers at the moment.
Why is Mei so cute yet pale when she smiles? Who can I thank for this wonderful character design?