Moshimo, Japan. The annual fireworks festival is about to take place and a group of schoolboys, arguing over whether they are round or flat when viewed from different angles, set out to find it out.
Nazuna Oikawa (voice)
Suzu Hirose
Norimichi Shimada (voice)
Masaki Suda
Yūsuke Azumi (voice)
Mamoru Miyano
Jun'ichi (voice)
Shintaro Asanuma
Kazuhiro (voice)
Toshiyuki Toyonaga
Minoru (voice)
Yuki Kaji
Nazuna's Mother's Fiancé (voice)
Shin-ichiro Miki
Teacher Miura (voice)
Kana Hanazawa
Teacher Mitsuishi (voice)
Takahiro Sakurai
Norimichi's Mother (voice)
Michiko Neya
Norimichi's Father (voice)
Nobuo Tobita
Yūsuke's Father (voice)
Mitsuru Miyamoto
Pyrotechnician (voice)
Fumihiko Tachiki
Nazuna's Mother (voice)
Takako Matsu
Announcer (voice)
Jun Inoue
Food Stall Owner (voice)
Tarusuke Shingaki
Nurse (voice)
Chiwa Saito
Nurse (voice)
Yu Shimamura
Reporter (voice)
Atsumi Tanezaki
Student (voice)
Yuumi Hirota
Student (voice)
Konomi Kohara
Student (voice)
Shuichi Uchida