Karakai Jouzu no Takagi-san: Water Slide

All I can really say about this special is that it was interesting seeing Takagi interact with another character besides Nishikata for once. The show's normal dynamic has them pretty much only ever spending time with each other, so having the double-date setup was a neat way to get some insights on how Takagi talks about Nishikata with other people, and what she's like when she isn't just bullying him.

Other than that, it's the swimsuit episode. An excuse for the artist to draw the female cast with more skin showing than normal. The titular water slide works as a good teasing mechanism but honestly I'm ... already starting to get a little sick of their whole dynamic and wish Nishikata would just grow a pair already. 7/10

*Disclaimer*
Just personal scratch.
Advised, possible spoilers.
Opinion & Informal

Art: 6/10 Same as the main season. Anatomic proportions are believable. Cute and lighthearted style and vibe.

Animation: 6/10 Same as the main season. Nothing too show-offy or any fluidity to note.

Plot: 6/10 Same as the main season. The adventures of a dense and stubborn boy and a clever and witty girl.
...
Development: 5/10 Nice to see that this particular bit was animated. I appreciate this OVA for that reason.

Characters: 5/10 Same. Develops the side-characters a bit more and their relationship/interactions with the main cast.

Music: 5/10 Same as main season. Same sound design. Nothing noteworthy.

Conclusion: 5/10 A simple OVA with a single-episode-based ending.

Overall: 5/10 Average OVA adapted faithfully from the manga, sort of, included the side characters too which weren't in the original story in the manga, I believe. Will revise if need be. Adds more substance to their relationship which is a plus.

AAAAHAHAHAAHA-AHHAHAHAHAAA-AHHAHAHAHA, Geeez, don't you just hate it when Takagi does that kind of giggle when she get's to tease Nishikata? But in here what we have was what can we call as the quintessential swimsuit service and thought not set in a beach instead in a water theme park , considering that we don't get to see Takagi tease Nishikata that much all thanks to another couple whom were trying or at least one of them trying to have quality time with her mate but the bromance between Nishikata and Nakai keep getting in the way, so Mano ends up having to content ... with just Takagi. But it kinda seem that in this anime people starts to get the memo that Mano wants to be with Nakai or at least 3 of them like Takagi, Nishikata and the fat guy Kimura as for the 3 girls namely Sanae, Mina and Yukari, well, they're kinda corny considering that Yukari was just too much of a kill joy to be sooo insecure about unable to swim when she can just go for those water slides, since they're very much shallow at the end or just take a dip at one of those kiddie pool beside it ain't like that her 2 other girl friend would leave her...btw Sanae's swim suit look more like something from the 30's geez. Enjoyment of this this, for me was something that should have been included with the parent anime, since after the anime ended for the winter season , this has become more like an " Oh Yeah" thing , artwise , well none of them characters look hot in their swimsuit service and quite frankly studio Shin-Ei animation should have just stopped from the anime itself so:

Story-Mediocre 5: Since it was still in connection with the parent anime.

Art-pathetic 1: None of the characters here in their swimsuit service were hot.

Sound- Mediocre 5: It was still the seme seiyuus who did it.

Character- Good 7: Since this ain't about Takagi and Nishikata but its about Mano and Nakai arc, cu'z here Nakai is the annoying one when he was simply oblivious about Mano's desire to be with him and it has to take Takagi, Nishikata and fat Guy to do something about it.....the 3 bitches, were boring.

Enjoyment-Fair 6: It ain't that bad, but it ain't that good either.

Overall-Decent 4: It's wholesome, so no season 2 pls.