Nights with a Cat
A comedy series that brings humor and levity to its premise.
Fuuta-kun has never owned a cat before, but his younger sister, Pii-chan, moves into his house with the round gray cat Kyuruga. Inexperienced with cats, Fuuta-kun has no idea what to expect, and each night after he returns home is marked by odd and endearing surprises from his new pet.
Plot summary from MyAnimeList. Data and images via Jikan API.