This image makes a wonderfully misleading thumbnail.
AAH!!
Please stop! Please stop!Let's try doing it on Mugi-chan!But you promised to only do one side!Part 1: Let's try shaving Mugi-chan's "pickled daikon"!
The joke here stems from a few panels of the manga (and a dream sequence from the anime) that go something like this:
Yui: Mugi chan's eyebrows are quite thick, aren't they.
Tsumugi: These are actually pickled daikon! Would you like a taste?
*Yui eats them mixed with something*Yui: This tastes great!
*Tsumugi cuts herself a new pair of eyebrows and sticks them on*