After losing his grandmother, the young boy Soichiro finds himself living alone in a quiet, lonely house. One day, his former pet cat, Chikage, returns to him transformed into a nekomata, a supernatural cat spirit. Taking on a human form, Chikage immediately assumes responsibility for running the household, flawlessly managing cleaning, laundry, and cooking while doting on Soichiro. The story follows the heartwarming and comedic daily life of this unlikely pair, playfully exploring a reversal of the traditional pet-and-owner relationship as the cat now takes perfect care of the boy.

As the seasons change from spring to summer, Soichiro and Chikage settle into a routine of small adventures, outings, and everyday moments. Their quiet life is interrupted by the sudden appearance of a second nekomata named Ruri, who joins their household and expands their growing supernatural family. With Ruri welcomed into the fold, the three of them navigate seasonal events, school functions for Soichiro, visits to his grandmother's grave, and the arrival of a mysterious visitor from the boy's past, deepening the bonds between the human boy and the cat spirits who have chosen to care for him.