There's an old decrepit building at the edge of the school grounds that hasn't been used for years, and it falls apart a little bit more each day. But the little house holds a secret, as Takahiro and his friends are soon to find out...they wind up making contact with a mysterious entity known as Saki. Can Takahiro save Saki's world from destruction.
Unfortunately the movie Antique Heart is not yet available on HBO Max.
| Directing | Junichi Watanabe | Director |
| Visual Effects | Hideki Araki | Key Animation |
| Visual Effects | Akio Kawamura | Key Animation |
| Visual Effects | Takeshi Honda | Key Animation |
| Visual Effects | Yoshinori Higuchi | Key Animation |
| Visual Effects | Hiroyuki Terada | Key Animation |
| Visual Effects | Satoshi Iwataki | Key Animation |
| Visual Effects | Atsuko Ishida | Key Animation |
| Visual Effects | Kazuko Maejima | Key Animation |
| Visual Effects | Cindy H. Yamauchi | Key Animation |
| Visual Effects | Takafumi Hayashi | Key Animation |
| Visual Effects | Yuka Kudou | Key Animation |
| Visual Effects | Miyuki Nakano | Key Animation |
| Visual Effects | Yoshie Kawamura | Key Animation |
| Visual Effects | Shizuo Kawai | Key Animation |
| Visual Effects | Tetsuro Aoki | Key Animation |
| Visual Effects | Yoko Kadogami | Key Animation |
| Visual Effects | Michiyo Suzuki | Key Animation |
| Art | Senri Sagawa | Art Direction |
| Visual Effects | Toshihiro Kawamoto | Key Animation |
