Doukyonin wa Hiza, Tokidoki, Atama no Ue.

Mystery writer Mikazuki Subaru, who isn't good at dealing with people, finds them to be a disturbance when it comes to building his imaginary world. One day, he chances upon a stray cat and feels inspiration strike, so he brings the cat home as his muse. Can watching the inexplicable behaviors of a cat form material for a novel? (Source: MU)