This image is unavailable on Danbooru. Go to Danbooru or disable safe mode to view (learn more).
Artist's commentary
Hang in There, Kogasa-san 2569
Well, my Sanae-san was also looking at a walkthrough for the first level of ICO, so she may just be bad at puzzle-solving stuff.
The answer shown in panel 4 is not the real answer to the riddle, by the way. Just so you know.