Short girls are super cute though.
Anything as long as it's not human.
Okay, sure, let's see.
She is clearly reading the book "Hadae no shita" in that picture. Now that book has two different editions. The paperback one is divided to two volumes, which is clearly indicated on the cover.
But this one has no volume indication whatsoever, so I can only assume it's the hardcover edition, which is only one volume.
However, at the spine of the book, the order from the top should be author (Kanbayashi Chouhei)→title. But at this picture, the order is reversed.
There was none. ISBN 4152085614 for the hardcover.
OP asked for a flaw, I pointed out one. End of story.
KyoAni ripped off Keit-Ai with Disappearance.
It's rare version which has a typo on the synopsis, only a few of those have been printed and most of them have been removed from the stores and replaced with the correct version. It has a high value for collectors.
This one is trying to outwit my autism.