"My Roommate is a Cat" (Doukyonin was Hiza, Tokidoki Atama no ue)
A SoL show from 2019, making it relatively recent compared to some other shows mentioned here, but something I still consider underviewed, or at least not talked about enough. It's also a pretty short watch, being 12 episodes like other seasonal shows.
The show follows the story of of Subaru, a socially awkward man who has separated himself from the rest of the world, and... a cat. While being a SoL anime, it's also the growth story of Subaru, and his companionship with Haru, the cat.
One thing I really like about the show is that it shows both the perspective of both Subaru (human) and Haru (cat). This bring really hilarious moments but also heartfelt and touching moments. It's not often you get to see an anime that's revolved around pets!
MAL here for the show (the reviews on MAL do a much better job at explaining than I do)
Also the opening song is one of my favorites of all time