Artist's commentary
Or so I say, but even Sanae-san's old enough that it wouldn't be odd for her to have seen it. :-) The joke for this strip will leave the young folks behind.
Oh, wait—not that Sanae-san isn't young or—aaagh...stop...pichuuun
By the way, I get the feeling this episode of Sysyl Mysyl was story about Lotteria.