Ganbare Douki-chan: Kakusa Shakai ni Nayamu Kaisha no Douki

TL;DR - A special episode that hints a second season.

Story - 5/10
A bath episode between the girls. Also, foreshadows a new character for the (possible) upcoming season.

Animation - 6/10
Same as the anime, cute and simple. Now that the characters have being on the beach, they even showed in their skin the tan lines, which is kinda neat.

Sound - 6/10
Same as the anime LOL same thing.
...
Characters - 6/10
Instead of watching their routine many times, now it’s just two situations that really show their main personalities.

Enjoyment - 6/10
There ain’t much to say, right? I wasn’t expecting anything, not like you could expect something big, but it was cool. It’s always cool to see a webcomic/manga you knew before being animated.
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Does it fit in with the other episodes yes. Many it is just as enjoyable as the other episodes.

Is it worth watching compared to the other episodes moments, not really.

It's a bit of the usual between the characters and it's also a kind of expected special/ova like with any series it isn't anything original or the characters that differently like some shows I know of that do make it a fun spin for an OVA/Special/Filler episode.

I think Tawawa S1 and 2 OVAs did do it a bit better though. That Tawawa DVD scene in S1 OVA 2 is the best over any beach episode like ... S2's OVA or any other short length series.


Spoilers:

In short it's an onsen bath/bit of dinner with everyone and a memory of the pool briefly. That's about the easiest way to sum it up. So not missing much and saved 5-6 minutes.

This is simply a special episode featured in the blue-ray version of "Ganbare Douki-chan" and as such it's just a filler episode and pretty skippable if you wish to do so, however it follows the basic blueprint of the main series so if you enjoyed that it's more content and having in account the fact that the episode is only five minutes I don't see why not watch after watching the main show. As usual of these blue-ray special fillers it has a bit more ecchi than the usual episode but nothing too outlandish.

I usually separate my reviews by plot, art, etc but since ... this is a 5 minute filler episode I don't see the point in doing so since I would just be repeating my review I did on the MAL page for the anime. I would personally recommend this episode since I found it enjoyable and it takes only 5 minutes of your day, but I know a big part of anime watchers don't care for fillers and are only interested in plot relevant content so if you recon you belong to the latter group than I see no reason you would want to watch this.