A brother and sister leave the big city to live with their veterinarian father when their mother is hospitalized. As they are adjusting to their new life filled with natural beauty, they adopt an abandoned puppy. When it is discovered that the puppy is actually a wolf, they choose to return the baby wolf to its mother in the forest rather than let it live a life in captivity.
Unfortunately the movie A Tale of Ululu's Wonderful Forest is not yet available on HBO Max.
| Writing | Akemi Moriyama | Writer |
| Directing | Makoto Naganuma | Director |
| Sound | Joe Hisaishi | Original Music Composer |
| Editing | Tomoki Sanjô | Editor |
| Camera | Osamu Fujiishi | Director of Photography |
| Art | Hiroshi Koike | Art Direction |
| Writing | Tomoko Yoshida | Writer |