In the heartwarming tale, a cat named Maru finds a home with Anna after being adopted from a shelter in Matsuyama city. Pampered and content, Maru grows plumper each day, lounging by the window to gaze at the garden. However, when a new cat, Cerisier, arrives and steals the family's attention, Maru's jealousy flares. After a hurtful confrontation with Cerisier, Maru, guided by the wisdom of a fellow feline, decides to venture out into the world, leaving the comfort of his home behind.