黑 川 校 長 與 老 師 們 正 在 熱 烈 地 談 論 著 四 月 份 開 始 啟 用 的 新 校 舍 ， 久 美 子 也 興 沖 沖 地 上 前 湊 熱 鬧 ， 黑 川 提 醒 久 美 子 ， 她 只 是 聘 用 到 三 月 份 的 臨 時 教 師 ， 這 讓 久 美 子 如 同 冷 水 潑 頭 一 般 。 土 屋 等 四 人 接 到 一 家 公 司 的 面 試 通 知 ， 久 美 子 興 奮 不 已 ， 她 組 織 學 生 們 演 習 面 試 過 程 ， 但 他 們 吊 兒 郎 當 的 模 樣 差 點 兒 把 久 美 子 氣 暈 過 去 。 在 面 試 的 前 一 晚 ， 土 屋 等 人 遇 到 附 近 高 中 的 老 對 頭 ， 他 們 雖 然 一 再 忍 讓 ， 但 最 後 還 是 受 不 了 對 方 蠻 橫 的 態 度 與 之 大 打 出 手 。 沒 想 到 這 一 切 恰 好 被 次 日 的 面 試 官 撞 見 ， 第 二 天 土 屋 等 四 人 還 沒 有 接 受 正 式 面 試 就 被 趕 了 出 來 。 久 美 子 為 了 能 讓 學 生 們 畢 業 後 有 個 好 的 去 向 ， 不 斷 求 情 ， 這 令 矢 吹 和 小 田 切 龍 等 人 感 動 不 已 ， 他 們 一 起 向 久 美 子 發 誓 “ 畢 業 前 再 也 不 打 架 了 ” ， 以 此 來 報 答 久 美 子 。 但 偏 偏 事 與 願 違 ， 對 方 再 次 前 來 挑 釁 ， 矢 吹 等 五 人 為 了 信 守 承 諾 ， 完 全 沒 有 抵 抗 ， 任 由 對 方 將 自 己 打 得 遍 體 鱗 傷 。 聞 訊 趕 來 的 久 美 子 見 此 情 景 深 受 感 動 。 黑 高 的 董 事 松 原 女 士 來 到 學 校 ， 因 為 她 的 孫 子 也 即 將 來 這 裏 上 學 ， 令 久 美 子 十 分 意 外 的 是 松 原 竟 是 自 己 曾 經 拔 刀 相 助 的 老 奶 奶 。 松 原 指 定 久 美 子 擔 任 孫 子 的 班 主 任 ， 這 樣 從 四 月 起 久 美 子 就 可 以 成 為 這 裏 的 正 式 教 師 了 … …