Kanojo to Kanojo no Neko, Kimi to Boku Recommendations
Both are short stories with monochrome animation about a cat and it's owner told from the point of view of the cat. Both emotional.
Kimi to Boku and Kanojo to Kanojo no Neko (She and Her Cat) are so eerily similar in their content, style, and portrayal that it's not out of the question to think that Makoto Shinkai drew a great amount of inspiration from Kimi to Boku, taking the best parts from the flash animation that aired a year earlier, sprucing it up with better art, animation, and music and modifying the souls of the characters somewhat. Kimi to Boku is worth a watch if you want to see something a little different, a tad slower, and a tinge more melodramatic.