
About half a year before the opening of the patisserie, La Soleil where the catgirls work with Kashou. Back when Chocola and Vanilla were still kittens when they first arrived at the Minazuki household and before they opened up to the other catgirls. (Source: Official site)
Nekopara EXTRA Koneko no Hi no Yakusoku is a Japanese anime of 4,693 characters, with 612 unique words and 214 different kanji. Its difficulty rating on Jiten is easy, 1.5 out of 5. The full vocabulary list ranks all 612 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
This title is too short to reliably find similar media.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.