Closeups of Grace's sketches from this comic
and this comic
The basic idea behind Grace's chart is the less covered up Nanase is, the more furious her mother gets. Which, I suppose, means Grace technically drew Nanase naked at one end of the chart. Given that it's a stick figure drawing, however, I feel she may be easily forgiven.
And, of course, the second sketch is of a giant sized Nanase climbing a building like King Kong.
Extra note: After posting this, I announced the update on my Twitter account
. What follows are those tweets:#EGS
New sketchbook entry that shows closeups of Grace's sketches#EGS
...Wait, does that technically make it a guest comic provided by a character from within the comic itself? o_O