Ushio is a freediver with strange powers. He and his friends are at a tropical land in search of a rare fish, the Blue Butterfly. This pursuit leads them to Ayuuru, a local girl who might know where to find the legendary fish.
| Directing | Mamoru Hamatsu | Director |
| Writing | Mamoru Hamatsu | Screenplay |
| Writing | Mamoru Hamatsu | Storyboard |
| Sound | Yoichiro Yoshikawa | Original Music Composer |
| Writing | Shô Kitagawa | Comic Book |
| Visual Effects | Takayuki Goto | Character Designer |
| Art | Norihiro Hiraki | Art Direction |
| Art | Yusuke Takeda | Art Direction |
| Visual Effects | Takayuki Goto | Animation Director |
| Visual Effects | Nobuyoshi Habara | Animation Director |
| Sound | Koichi Chiba | Sound Director |
| Camera | Akihiko Takahashi | Director of Photography |
| Production | Mitsuhisa Ishikawa | Producer |
| Visual Effects | Toshihiro Nakajima | Key Animation |
| Visual Effects | Munenori Nawa | Key Animation |
| Visual Effects | Shinichi Yamaoka | Key Animation |
| Visual Effects | Akiharu Ishii | Key Animation |
| Visual Effects | Yoshio Mizumura | Key Animation |
| Visual Effects | Tatsuya Oka | Key Animation |
| Visual Effects | Seiji Kishimoto | Key Animation |
| Visual Effects | Mitsuru Ishihara | Key Animation |
