Spring, 1941: 16-year-old Toshihiko attends school in the coastal town of Karatsu, where his aunt cares for his ailing cousin. Immersed in the seaside's nature and culture, Toshihiko soon befriends the town's other extraordinary adolescents as they all contend with the war's gravitational pull.
| Actor | Role |
|---|---|
 Shunsuke KubozukaToshihiko Sakakiyama | Toshihiko Sakakiyama |
 Shinnosuke MitsushimaUkai | Ukai |
 Keishi NagatsukaKira | Kira |
 Tokio EmotoAso | Aso |
 Honoka YahagiMina Ema | Mina Ema |
 Hirona YamazakiAkine | Akine |
 Mugi KadowakiChitose | Chitose |
 Takako TokiwaKeiko Ema | Keiko Ema |
 Takehiro MurataProfessor Yamauchi | Professor Yamauchi |
 Tetsuya TakedaDr. Ichijo | Dr. Ichijo |
 Wakaba IrieOld Maid | Old Maid |
 Kiyotaka NanbaraToshihiko's Father | Toshihiko's Father |
 Yuriko OnoToshihiko's Mother | Toshihiko's Mother |
| TTaiyo OkamotoRyo Ema | Ryo Ema |
 Toshie NegishiWoman at the Brothel | Woman at the Brothel |
 Shinnosuke IkehataOld Prostitute | Old Prostitute |
 Takahito HosoyamadaMilitary Police Man | Military Police Man |
 Kayoko ShiraishiProfessor Yamauchi's Mother | Professor Yamauchi's Mother |
| RRyunosuke OkawaOnnagata Actor | Onnagata Actor |
 Tsurutaro KataokaCaligrapher | Caligrapher |
 Masahiro TakashimaAkine's Father | Akine's Father |
| YYujiro HaraAkine's Brother | Akine's Brother |
 Tōru ShinagawaOld Man at Festival | Old Man at Festival |
 Takao ItōPresent Day Toshihiko | Present Day Toshihiko |