Like Index-tan and Shana-tan, this omake has nothing to do with the storyline and simply a way... for the studio to get creative I guess? What goes on in these two episode is crazily random and the characters talk as if they're on high. Of course, most of what they're talking about have reference to the main storyline so you'll still "get it". The way they poke fun the certain character's particular traits is also pretty funny. I'll say it's worth taking a look if you don't mind watching the little extras that always comes with the DVD/Blu-rays.