A nameless cat is entrusted with a solemn promise: to take the place of its beloved owner, Yoshizawa, who has mysteriously vanished. Donning a business suit and standing on two legs, the cat reports to a human office under the borrowed identity of Yoshizawa Neko. Five years pass as the feline worker endures workplace harassment, navigates corporate etiquette, and clings to hope that Yoshizawa will one day return. The story follows the tough yet endearing cat's daily grind—from coping with job stress and dodging baths and vaccinations to bonding with coworkers over diet challenges and girls' gatherings, even playing baseball with a neighborly duck. As Yoshizawa Neko grows more accustomed to human society and office life, the manga depicts a whimsical blend of workplace comedy and slice-of-life survival, all driven by unwavering loyalty to the missing person it was asked to wait for.