On page 9, An's text bubble icon looks like she's leaning over with a broken back while making an 'X' with her arms. Took me a second to realize that it was just her scarf.
If there was another timeline, I would love to see Arata and Chizuru (even An and Yoake) grow up with them. It would be so interesting to see how their dynamics would be but also still be as close as they are now ;w;