Jun, the ace in his swimming team, lost against his rival, Naoki, at the summer college tournament. But since then there is a special feeling between them...
Unfortunately the movie Gymnasium Baby is not yet available on HBO Max.
| Directing | Yoshihiro Fukagawa | Director |
| Writing | Keiko Kanome | Original Story |
| Writing | Yoshihiro Fukagawa | Screenplay |
| Writing | Keiko Kanome | Screenplay |
| Camera | Hikaru Yasuda | Director of Photography |
| Lighting | Hikaru Yasuda | Lighting Technician |
| Sound | Mamiko Hirai | Original Music Composer |
| Sound | Fumiaki Unehara | Original Music Composer |
| Sound | Soong Chin-sui | Sound Recordist |
| Art | Kazuhisa Hatakeyama | Art Direction |
| Editing | Yui Miyatake | Editor |
