In 2017, a short anime film called Hypersonic Music Club was produced in Japan. It was directed and written by Osamu Kobayashi, a veteran of the industry who passed away in April 2021. For various reasons, this short anime was never released. It was made public on August 1, 2023.
| Directing | Osamu Kobayashi | Director |
| Writing | Patrick Macias | Original Story |
| Writing | Osamu Kobayashi | Writer |
| Art | MITSUME | Original Series Design |
| Visual Effects | Takashi Mukouda | Character Designer |
| Visual Effects | Hisashi Mori | Animation |
| Visual Effects | Mitsuo Iso | Animation |
| Visual Effects | Yoshimichi Kameda | Animation |
| Visual Effects | Takashi Mukouda | Animation Director |
