Resized to 85% of original (view original)
Artist's commentary
Because it's Good Knee High Socks Day, I provisioned the uniform of a popular knee-high ship to Bukki as a result.
Good Knee High Socks Day is an unofficial holiday celebrated on November 28th. The date 11/28 can be read as "いい/には", with "いい" meaning "good" and "には" sounding like "knee high" (thus, it is goroawase).