Story:
Yamada is on the greenery committee at school. She's started going out with Kase-san, the star of the track team and a girl who's "way cooler than any boy." So, this takes uses material from after the first volume of the manga. And it basically goes over a bunch of the events they experience from the second and third volumes of the manga.
The big issue with this as an adaptation is that it skips a lot of the sweeter, more contented moments where Kase and Yamada are just happy and being adorable in favour of showcasing the more "dramatic" moments. Which makes it seem more melodramatic than it actually is. It also has the unfortunate side effect of making Kase & Yamada seem really insecure. Yeah, every couple has those moments but when it's the majority of what you see it comes across as worse than when it's a more occasional thing.
That being said, it does a good job of presenting those moments it includes. Albeit a bit abridged. And those more cutesy moments they did include like Kase-san visiting Yamada's house or the pair on the plane do make for some very nice scenes.
Characters:
The big problem here is the insecurity issue. In this OVA, our heroines spend more time being worried about their relationship and thinking it might be about to end than they spend being happy and appreciating each other. And since you don't see how they got together, you don't really know why they bother unless you've read the first volume of the manga and all the happy moments from the second and third volumes that the OVA skipped.
It doesn't help that the characters aren't all that complex and the main draw of the manga is that they're absolutely adorable and their whole dynamic is just a joy to read. Not when the OVA is determined to undermine that aspect as much as possible.
Art:
I do have to give Zexcs credit here. They did a great job of capturing the art style and bringing it to life. Which does make for a very pleasant looking OVA. The characters look good, the animation flows nicely and the backgrounds were nicely filled out.
Sound:
Sakura Ayane & Takahashi Minami do an excellent job in the leading roles. They capture the chemistry betwixt the girls pretty much perfectly and pull off both the more dramatic and cutesy moments handily. The music is nice. Especially the ending duet with our leads.
Ho-yay:
This one is all about the les-yay.
Areas of Improvement:
A better job capturing the Manga's aesthetic. Here's the thing, most of the manga is less dramatic, more cutesy. If this OVA had one big dramatic sequence at the end and the rest focused more on cutesy moments, it would better represent what you can expect from the manga and the characters wouldn't come across as so insecure.
Show the start of the relationship. I get that they don't want to spend much time on it, but it would help our investment if we saw at least a flashback of how they got together rather than having Yamada monologue about it.
Stronger Supporting Cast. This is an issue with the manga too. We rarely see much of any characters besides Yamada & Kase. The strongest supporting character we get is Mikawa and she mostly shows up when Yamada needs someone to talk about her relationship with.
Final Thoughts:
I don't recommend letting this OVA be your introduction to Kase-san. Yes, it has its moments but the general focus on the more tumultuous points of their relationship could easily give you the impression that it's a lot more filled with insecurity and generally much weaker than it actually is. If anything, I would say this is a good supplement for the manga. So, if you read the first three volumes and you want to see some of the scenes brought to life, I'd absolutely watch this. But I'd generally go with the manga over the OVA. It's only five volumes and has a lot of cuteness. And that's not including the ongoing follow up manga. For the OVA, I'll give it a 6/10.
