Rihito Sajo, an honor student with a perfect score on the entrance exam and Hikaru Kusakabe, in a band and popular among girls, would have never crossed paths. Until one day they started talking at the practice for their school’s upcoming chorus festival. After school, the two meet regularly, as Hikaru helps Rihito to improve his singing skills. While they listen to each other’s voice and harmonize, their hearts start to beat together.
Unfortunately the movie Dou kyu sei – Classmates is not yet available on HBO Max.
| Art | Shoko Nakamura | Storyboard Artist |
| Art | Akemi Hayashi | Storyboard Artist |
| Visual Effects | Ritsuko Utagawa | Color Designer |
| Visual Effects | Katsuaki Miyaji | CG Animator |
| Visual Effects | Hirokazu Kojima | Animation Director |
| Visual Effects | Hirokazu Kojima | Key Animation |
| Visual Effects | Tomoyo Kamoi | Key Animation |
| Production | Shizuka Kurosaki | Producer |
| Visual Effects | Hisako Shimozuma | Key Animation |
| Visual Effects | Saori Yonezawa | Key Animation |
| Visual Effects | Mitsuko Baba | Key Animation |
| Visual Effects | Yuko Tagawa | Key Animation |
| Visual Effects | Akemi Hayashi | Key Animation |
| Visual Effects | Emiko Shimura | Key Animation |
| Visual Effects | Shinobu Mori | Key Animation |
| Visual Effects | Mitsuko Baba | Animation Director |
| Visual Effects | Haruka Tanaka | Key Animation |
| Editing | Yuji Kondo | Assistant Editor |
| Visual Effects | Natsuki Yokoyama | Key Animation |
| Visual Effects | Naoyuki Tatsuwa | Key Animation |
| Visual Effects | Manami Umeshita | Key Animation |
| Production | Atsuhiro Iwakami | Executive Producer |
| Visual Effects | Atsushi Saito | Key Animation |
| Visual Effects | Ai Takashi | Key Animation |
| Visual Effects | Yusuke Tanaka | Animation |
| Art | Chieko Nakamura | Background Designer |
| Art | Emiko Kaneyama | Background Designer |
| Visual Effects | Katsuhiko Kitada | Key Animation |
| Visual Effects | Aiko Sonobe | Key Animation |
| Visual Effects | Kaori Sato | CG Animator |
| Visual Effects | Yuu Shindou | Key Animation |
| Directing | Shoko Nakamura | Second Unit Director |
| Directing | Akemi Hayashi | Second Unit Director |
| Visual Effects | Katsuhiko Kitada | Animation Director |
| Visual Effects | Atsushi Nishigori | Key Animation |
| Visual Effects | Keisuke Kobayashi | Key Animation |
| Visual Effects | Keiko Nakaji | Animation |
| Sound | Eiko Morikawa | Sound Effects |
| Art | Hikari Hashimoto | Background Designer |
| Art | Ayae Kanbe | Background Designer |
| Art | Satomi Nagasawa | Background Designer |
| Visual Effects | Akemi Hayashi | Supervising Animation Director |
| Visual Effects | Jun Uemura | Animation Director |
| Visual Effects | Kaori Sato | CGI Director |
| Visual Effects | Akemi Hayashi | Animation Director |
| Visual Effects | Shoko Nakamura | Key Animation |
| Visual Effects | Ryosuke Nishii | Key Animation |
| Editing | Yukino Shimoda | Assistant Editor |
| Visual Effects | Mai Yoneyama | Animation Director |
| Visual Effects | Yumi Kobayashi | Key Animation |
| Visual Effects | Yoshihiko Umakoshi | Key Animation |
| Visual Effects | Asako Inayoshi | Key Animation |
| Visual Effects | Yuta Tsuchiya | Key Animation |
| Visual Effects | Shinya Horii | Modeling |
| Visual Effects | Takuya Kawai | Animation |
| Directing | Kana Shundo | Second Unit First Assistant Director |
| Visual Effects | Asami Mannen | Key Animation |
| Visual Effects | Takeshi Honda | Key Animation |
| Visual Effects | Tomomi Kawatsuma | Animation |
| Production | Tomonori Ochikoshi | Executive Producer |
| Visual Effects | Jun Uemura | Animation |
| Visual Effects | Tetsuya Nishio | Key Animation |
| Visual Effects | Akiko Sugizono | Animation |
| Visual Effects | Miyuki Kuroki | Animation |
| Editing | Iko Yasuda | Online Editor |
| Visual Effects | Dena Akehara | Key Animation |
| Visual Effects | Akira Takata | Key Animation |
| Visual Effects | Moeka Kuga | Key Animation |
| Visual Effects | Yusuke Yoshigaki | Key Animation |
| Visual Effects | Minami Seki | Key Animation |
| Visual Effects | Hiromi Taniguchi | Key Animation |
| Visual Effects | Yuka Sugizaki | Key Animation |
| Sound | Lin Shugong | Sound Mixer |
| Visual Effects | Takeru Ogiwara | Compositing Artist |
| Visual Effects | Kasumi Togo | Compositing Artist |
| Visual Effects | Kenji Fujita | Compositing Artist |
| Visual Effects | Mayuko Koike | Compositing Artist |
| Visual Effects | Ayaka Shimizu | Compositing Artist |
| Visual Effects | Daishi Nishikawa | Compositing Artist |
| Visual Effects | Shinji Tonsho | Compositing Artist |
| Visual Effects | Yuya Sakuma | Compositing Artist |
| Production | Hanako Yamashita | Associate Producer |
| Visual Effects | Shouko Hayashi | Animation |
| Visual Effects | Yukiko Nagase | Compositing Artist |
| Art | Chieko Nakamura | Art Direction |
| Writing | Asumiko Nakamura | Comic Book |
| Visual Effects | Akemi Hayashi | Character Designer |
| Sound | Kotaro Oshio | Original Music Composer |
| Editing | Shigeru Nishiyama | Editor |
| Camera | Yukiko Nagase | Director of Photography |
| Directing | Shoko Nakamura | Director |
| Writing | Asumiko Nakamura | Writer |
| Sound | Akiko Fujita | Sound Director |
