Mito, who felt his joy and indescribable anxiety about the evolution of Seven, which has become completely human recently, takes Keita and his friends to their hideout. There were many prototypes that were discarded by the time the von Braver was completed. And to them, Mito began to tell the old story of the time when Soda and Date were developing the von Braver ...
最近すっかり人間らしくなってきたセブンの進化に、嬉しさと同時に言い知れない不安を感じた水戸は、ケイタたちを自らの隠れ家に連れて行く。そこには、フォンブレイバーが完成するまでに廃棄された試作品が数多く眠っていた。そして二人に、水戸は宗田と伊達とフォンブレイバーを開発していたころの昔話を語り始めて…。