Mameshiba Cubbish Puppy (2009)

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.

Unfortunately the movie Mameshiba Cubbish Puppy is not yet available on HBO Max.