Against all odds, a promise will be kept.
In a post-war alternative timeline, Japan is divided into the North, controlled by the Union, and the South, controlled by the United States. A mysterious high tower rises within the borders of the Union. Three high school students promise to cross the border with a self-built airplane and unravel the secret of the tower.
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Hidetaka YoshiokaHiroki Fujisawa (voice)
Masato HagiwaraTakuya Shirakawa (voice)
Yuuka NanriSayuri Sawatari (voice)
Unsho IshizukaOkabe (voice)
Kazuhiko InoueTomizawa (voice)
Risa MizunoMaki Kasahara (voice)
Hidenobu KiuchiArisaka (voice)
Masami IwasakiEmishi Seisakujo Koin / Eki Shanai Announce / Byoin Incho (voice)
Eiji TakemotoEmishi Seisakujo Koin / TV News (voice)
Takahiro HiranoEmishi Seisakujo Koin / Daigakuinsei (voice)
Takeshi MaedaDaigakuinsei / Radio Hoso (voice)
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