Cats were always be cute & popular creatures and most people agree on that, so it's common to see an anime that often comes up with their brilliant idea such as combining human and cat into a half-cat human(Nekomimimi), half-cat human(Nekomimimi) have often been used by several anime as part of the story plot, and Nyanko Days is one of them.
As a cat lover, this anime is the cutest thing I've ever watched, by bringing us a story about a high school student named "Yuuko Konagai" who has three kitties were enough to make us enjoy it from episode-to-episode, I'm just hoping for them to make the 2nd season of Nyanko Days with longer episodes.