The story centers around two close siblings, Ylion and Callysia. One day, because the siblings' father tried to capture a unicorn, Callysia is spirited away. A decade later, Ylion has grown up to become a powerful warrior. With a sword of unicorn horn from the king, Ylion sets off for the mid-air garden where unicorns live.
Unfortunately the movie Ylion and Callysia is not yet available on HBO Max.
| Directing | Takashi Nakamura | Director |
| Sound | Chad Cannon | Original Music Composer |
| Sound | Koji Kasamatsu | Sound Director |
| Writing | Takashi Nakamura | Screenplay |
| Visual Effects | Terumi Nakauchi | Color Designer |
| Directing | Mitsunori Murata | Assistant Director |
| Art | Tatsuya Kushida | Art Designer |
| Visual Effects | Hiroyuki Yoshida | CGI Director |
| Art | Takashi Nakamura | Storyboard Artist |
| Writing | Takashi Nakamura | Original Story |
