Artist's commentary
When You Say Drills
I thought it would be cute if it turned out like this... so. ■Thanks for the various tags, lol. To those who like drills, though this is a video from before Ruko was born, I recommend "Paean to Drills" http://www.nicovideo.jp/watch/sm3893338. It's still cute when I watch it now (´∀｀*)