While visiting his parents' grave, novelist Subaru Mikazuki has a chance encounter with a stray cat and brings it home to live with him. He watches the cat behave in unexpected ways leading him to come up with all kinds of ideas for his next novel to share with his new editor, Atsushi Kawase. While working nonstop on his novel to meet a deadline, the cat starts scattering food on the ground and scratching the door to his room...