The anime series is inspired from a 4-koma series, created by the dōjin mangaka Hiroyuki.
Sounds cool doesn’t it. I personally love 4-koma. If you’re not familiar with it, 4-koma is a sort of simplified manga, made to be funny. Some popular series have had 4-koma done on them. I doubt you haven’t seen one since they appear in all sorts of material and places. They consist of one single page split up in 4 boxes of the same size. You can have a series of them, but each page is its own gag. All be it, sometimes, a gag from one such strip may be related to an one or more earlier ones.