The man once called the world's strongest agent became an educator training the next generation upon his retirement. After raising disciples and passing sixty years of age, he dies in an operation orchestrated by those in power above him, but is reborn into another world while retaining his memories. Though surprised by different races and magic, he adapts with his characteristic quick thinking, turning everything into his own sustenance. As he masters special magic and continues rigorous training, he reaches the strongest level of power, but decides to pursue the path of educator once more—something he left unfinished in his previous life. This is the story of an educator who, based on the memories and experiences of his former life, travels the world together with his disciples.
| Word | Frequency | Difficulty |
|---|---|---|
| 白旗 | 1 | 4.73 |
| 誠心誠意 | 1 | 4.66 |
| 一つとして | 1 | 4.34 |
| 玉鋼 | 1 | 5.37 |
| 役に立たない | 1 | 4.16 |
| 鞍替え | 1 | 4.97 |
| 身持ち | 1 | 5.33 |
| 一念発起 | 1 | 5.59 |
| じんわり | 1 | 4.69 |
| 頬擦り | 1 | 5.12 |
| 迂曲 | 1 | 7.59 |
| 敵国 | 1 | 4.26 |
| 切り開き | 1 | 5.23 |
| 薄め | 1 | 4.69 |
| 愚弄 | 1 | 4.66 |
| 食い意地 | 1 | 4.93 |
| 合金 | 1 | 4.43 |
| 軽口を叩く | 1 | 4.91 |
| 喧嘩を買う | 1 | 6.14 |
| 貯まる | 1 | 4.48 |
| 降り始める | 1 | 5.53 |
| 焼き上がる | 1 | 5.63 |
| 薄れゆく | 1 | 5.18 |
| 損得 | 1 | 4.97 |
| 早い者勝ち | 1 | 4.95 |
| あらぬ方向 | 1 | 4.69 |
| 段差 | 1 | 4.63 |
| どこであれ | 1 | 5.97 |
| 垂れ流す | 1 | 4.97 |
| 気楽 | 1 | 3.87 |
| これにより | 1 | 4.27 |
| 改善点 | 1 | 5.07 |
| 振り降ろす | 1 | 5.57 |
| 高性能 | 1 | 4.25 |
| はりす | 1 | 5.38 |
| 巡り合い | 1 | 6.09 |
| タコ | 1 | 4.20 |
| 実物大 | 1 | 5.85 |
| 研究成果 | 1 | 4.73 |
| パート | 1 | 4.62 |
| どうなることやら | 1 | 5.15 |
| 静 | 1 | 4.24 |
| 大絶賛 | 1 | 5.22 |
| 何から何まで | 1 | 4.63 |
| 軽火器 | 1 | 6.55 |
| 衰退 | 1 | 4.56 |
| ベター | 1 | 5.11 |
| 対空 | 1 | 4.56 |
| 実感が湧く | 1 | 5.97 |
| 善人 | 1 | 4.46 |
| 随一 | 1 | 4.45 |
| グネグネ | 1 | 5.60 |
| 時を待つ | 1 | 5.32 |
| 百年前 | 1 | 4.88 |
| 絨毯爆撃 | 1 | 5.36 |
| 逆さま | 1 | 4.79 |
| 半泣き | 1 | 4.54 |
| 裏切り者 | 1 | 4.15 |
| 安全性 | 1 | 4.52 |
| 1週間 | 1 | 4.26 |
| 二組 | 1 | 4.59 |
| 買い付ける | 1 | 5.07 |
| 揮う | 1 | 5.15 |
| 薬学 | 1 | 4.75 |
| お飾り | 1 | 4.52 |
| 駄々 | 1 | 4.54 |
| 四方八方 | 1 | 4.38 |
| 感情表現 | 1 | 4.96 |
| 使用権 | 1 | 5.32 |
| 自責の念 | 1 | 4.97 |
| 対角 | 1 | 5.79 |
| 顔が綻ぶ | 1 | 5.64 |
| 空虚 | 1 | 4.52 |
| 下手すると | 1 | 4.55 |
| 楽しみにする | 1 | 5.43 |
| 受信専用 | 1 | 6.53 |
| ボーリング | 1 | 5.33 |
| 唐様 | 1 | 5.91 |
| 渡海 | 1 | 4.81 |
| 親御さん | 1 | 4.79 |
| 傑作 | 1 | 4.71 |
| 番える | 1 | 4.50 |
| 自己暗示 | 1 | 5.22 |
| 平穏 | 1 | 3.83 |
| 抑え込み | 1 | 4.90 |
| 大それた | 1 | 4.67 |
| 思念 | 1 | 3.96 |
| 一例 | 1 | 4.94 |
| ほうが良い | 1 | 3.44 |
| 毒牙にかかる | 1 | 6.09 |
| 好条件 | 1 | 4.81 |
| 藪をつついて蛇を出す | 1 | 5.92 |
| 低め | 1 | 4.49 |
| 吹っ切る | 1 | 5.14 |
| 狩猟犬 | 1 | 5.96 |
| 幸先 | 1 | 4.95 |
| 袴 | 1 | 4.42 |
| 拾い物 | 1 | 5.28 |
| 五指に入る | 1 | 5.40 |
| 脱する | 1 | 4.75 |
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