Jiro (Jiro Sato) is a 32-year-old man who doesn't have a job. He lives at his parents' house and doesn't go outside or socialise with people. After the death of his father, Jiro's mother runs away and leaves behind a 6 month dog named Ichiro and some clues for Jiro. To find his mother, Jiro has to venture out into the world.

4th installment in the "Mameshiba" series, adapted from the TV show. Jiro, who had successfully overcome his shut-in lifestyle but sought a life free from his mother's watchful eye, runs away from home with his beloved Mameshiba dog, Ichiro, and experiences various events in a seaside town.

An unemployed middle-aged man, Shiba Jiro, who has been living at home for 38 years on his parents' back, breaks away from his NEET lifestyle through his mother's strategy. He works at a pet store and lives alone in an apartment with his partner, Ichiro Mameshiba, a dog.

Introvert Jiro Shiba (Jiro Sato) who came out of his shell a bit with the help of a cute puppy faces a crisis, when he loses his pet due to being accused of exploiting it for economic purposes...