Kuroneko wa Shippo de Amaeru

A novelist named Sakaguchi adopts a weak kitten and is visited by a high schooler named Kazuya, who comes to see the cat. Kazuya unexpectedly confesses his feelings, which Sakaguchi initially dismisses as childish. However, Kazuya's shy and awkward confession, along with his blushing, makes an impression on Sakaguchi. As their relationship develops, the story explores the complexities of adult love between the two individuals.