綠 川 學 園 高 的 八 十 多 名 男 生 離 奇 死 亡 ， 他 們 全 是 因 一 奇 形 多 角 尖 標 神 秘 的 出 現 腦 中 致 內 出 血 而 死 ， 謠 傳 死 者 生 前 都 曾 遇 上 一 名 神 秘 青 年 。 另 一 方 面 ， 長 野 附 近 發 生 一 宗 冷 血 大 屠 殺 ， 應 一 條 所 託 ， 櫻 子 前 去 長 野 實 地 了 解 … …