This short film introduces Semira, a strange boy who comes to play with Ojaru and his chums and bears a marked resemblance to a boy of the same name who spent a summer with the village elders when they were boys, long ago.
Unfortunately the movie Prince Mackaroo the Movie: The Promised Summer - Ojaru and Semira is not yet available on HBO Max.
| Writing | Rin Inumaru | Original Story |
| Directing | Akitarou Daichi | Director |
| Writing | Reiko Yoshida | Writer |
| Visual Effects | Harumi Tamano | Pre-Visualization Supervisor |
| Visual Effects | Hajime Watanabe | Character Designer |
| Art | Sakamoto Nobuhito | Art Direction |
| Crew | Hisao Kazamura | Digital Effects Supervisor |
| Editing | Masao Nakagawa | Editor |
| Sound | Harukichi Yamamoto | Music |
| Sound | Yasuo Tachibana | Recording Supervision |
| Production | Hisako Matsumoto | Producer |
| Production | Atsushi Itou | Producer |
| Visual Effects | Ayao Wakana | Animation Coordinator |
| Visual Effects | Shigerou Sugimura | Animation Director |
| Sound | Saburo Kitajima | Songs |
