Doukyonin wa Neko no Neko-san

Neko-san, a cat, joins Chiyuru's workplace as part of a project to diversify the company. Chiyuru, who is in charge of teaching him, is immediately captivated by her fluffy coworker. In the evening, on her way home, Chiyuru sees a fire burning along the riverside. To her surprise, the house on fire is the home of the new employee, Neko-san...! The outlandish cat Neko-san ends up living with the ordinary office lady Chiyuru in a strange cohabitation arrangement full of laughter and fluffy fluffy fluff!

(Source: Kodansha, translated)