It's a show to watch one or two episodes from time to time to relax and laugh a bit, it doesn't have plot at all, the episodes don't correlate with each other, it's just two main characters interacting with silly stuff with help of 3rd one that comes from time to time.
It looks like a 3 minute show you know but they managed to pull it to 25minutes and for me it was entertaining, i loved the OP and ED yeah the formula it's repetitive it's Yasuna trying to make something funny and Sonya just ends up getting angry and hitting her, yeah it's simple but they apply it to some original situations and it ends up being funny, at least to me.
The only thing i encounter a bit disturbing was that in some moments i felt as if Sonya was being too abusive with Yasuna, like she was so kind and genki and Sonya was such a cruel person.
