These little chibi episodes are a common staple of slice of life anime. They're usually bundled with the home release or put out via twitter or youtube or something as a promotion. The joke here is that these episodes are meant to show you what the series is like, but then proceed to do nothing like that. The first episode has all the characters acting the opposite of how they should, the second episode has them all trying to be Vtubers and the rest is some standard hijinks from the amusement club condensed down into 5 minute chunks. If you're a fan of the series you'llprobably think these are mildly funny, but if you haven't watched a whole lot of it you'll probably just be confused. 6/10