Yui works as an expert housekeeper, a profession she takes seriously to support her family. Despite her efficiency in cleaning any home, she has a notable aversion to cats. Her latest assignment brings her to the residence of Yoru Shinonome, a painter and illustrator with jet-black hair and striking eyes that immediately remind her of a black cat. She finds his mannerisms and behavior distinctly feline, which makes him difficult for her to handle, yet she cannot help but feel drawn to him for reasons she does not fully understand. The story follows their evolving relationship as Yoru, who recognizes and appreciates Yui's strong work ethic, begins to show a deep and doting affection towards her. The manga is a josei series that blends romantic comedy with slice-of-life elements, set within the contemporary confines of Yoru’s home and studio where their professional arrangement gradually becomes more personal. Serialized in Shogakukan's Petit Comic magazine, the narrative explores the growing bond between a no-nonsense housekeeper and a reclusive, cat-like artist as they navigate their mutual attraction.