A cat from the modern world dies a tragic death but is granted a second chance at life, reincarnating as a kitten in a fantasy realm where cats have never existed. This world operates on the rules of swordplay and magic, and its inhabitants—from adventurers to knights—have no concept of what a house cat is. The story begins when a hero, returning home dejectedly after receiving orders to confront a demon king, stumbles upon this mysterious fluffy creature and decides to take it in.

The central narrative follows the hero and his unique companion as they navigate a land unfamiliar with feline behavior. The cat’s natural instincts, such as playing with toys, toe beans, and begging for snacks, become a source of wonder and comedy for the fantasyland adventurers who encounter her. A significant early conflict arises when the knight captain’s folded-eared cat meets the hero’s cat, leading to a paw-to-paw standoff between the two fuzzballs. In an unexpected turn of events, the hero ends up working a part-time job at a cat café, where his coworker is none other than the demon king himself. The series combines isekai reincarnation tropes with slice-of-life humor, focusing on how a world without cats reacts to the introduction of one very ordinary feline.