NekoPara vol. 1! The one that started it all. It came out in 2014, and I read it first in 2018. The first read took me 2 months, holy crap. I'm a slow reader. Any ways, the first hour is one long angst fest as Kashou tries to convince Chocola and Vanilla to go home, and they beg Kashou to let them stay with him at his new bakery. They prove their worth, become waitresses, and all the rest of the novel is mostly fluff.
The NekoPara OVA was a crowdfunded project released in 2017. In one hour, it covers the basic story of NekoPara vol 1. Though it is much shorter than the VN it's based on, it has the added benefit of the main character Kashou, being fully visible and voice acted. In the VN, he has no voice acting and his face is obscured.
NekoPara vol 0 is a short bonus volume that takes place before vol 1 begins. It's about an hour long, and Kashou isn't really in it. It just follows the catgirls in a day in the life.
NekoPara Extra is a short VN prequel to NekoPara 1. It was written as bonus content and published in 2018. It features all the catgirls much younger than in the regular volumes. You see Chocola, Vanilla, and Coconut as kittens. Maple, Cinnamon, and Azuki are already grown, but still cute.
Before the NekoPara anime came out, NekoPara had two OVAs, that were bonus content. The NekoPara Extra OVA is about the same story as the NekoPara Extra visual novel. You meet Chocola and Vanilla as kittens getting used to the Minaduki household, and having their first Christmas there. The whole OVA is about 21 minutes long.
The animation is pretty good, very traditional. All the characters look very distinct and accurately represented of their VN artwork. I'm not sure, but it sound like the same voice actors for the VN were used for this OVA. It's all in Japanese, so I watched it with subtitles, which seemed accurate enough. I was able to follow what was going on and everything.
This OVA is available for free through a Steam purchase of the NekoPara Extra VN, which is only 5$, so I think it's worth it.
