雄 介 、 一 條 和 櫻 子 在 城 南 大 學 一 起 討 論 ， 零 號 那 個 血 字 跟 碑 文 的 其 中 一 段 之 間 的 關 係 。 結 果 ， 他 們 發 現 古 迦 跟 未 確 認 生 命 體 的 首 領 「 零 號 」 其 實 是 一 樣 的 ！ 與 此 同 時 ， 鯊 魚 怪 在 空 中 開 始 牠 的 殺 戮 遊 戲 … …