It's basically Lucky Star / Azumanga Daioh, if you turned the Konata-Kagami / Kaori-Sakaki tension up to 11. Just cute girls screwing around and being not so subtly gay - What more could you want from a "turn your brain off and have fun" series? Love the characters' chemistry & characterization, and soft fanservice without being too overt. Art style & animation's pretty basic, nothing to write home about. The comedy hits just right - It's not laugh-out-loud funny but it will get you invested enough for a good smirk now & then. If I had to give a negative criticism - the dynamics between Kei, Chiho and Yui aresuper blurry and hard to follow.

I'm honestly impressed at how much it manages to pack into such a short series.
I only wish it had a second season - and also that Kei would get lost already. She's SO extra.