Ja'iru was nothing more than an unremarkable demon clan baron, but due to a minor accident, he ended up defeating one of the Grand Dukes second only to the Demon King, and found himself taking over that position. This is the story of Ja'iru's first and second years as he aimed to live as peacefully as possible among the demon clan, whose members were mostly muscle-headed. Surrounded by his selfish sister with a brother complex, the most powerful queen, his womanizing best friend, a somewhat perverted Demon King, a strict butler, an expressionless subordinate, and others, Ja'iru's peaceful daily life continued on as always. From the third year onward, I am writing the sequel as "The Peaceful Daily Life of the Demon Clan Grand Duke" → "The Peaceful Daily Life of the Terror Grand Duke."
| Word | Frequency | Difficulty |
|---|---|---|
| 庇護者 | 1 | 5.20 |
| 愛用 | 1 | 4.15 |
| 睨めつける | 1 | 5.07 |
| 決定権 | 1 | 4.75 |
| 歴史 | 1 | 3.34 |
| 繰り上げる | 1 | 5.82 |
| ニヒル | 1 | 4.92 |
| 元来 | 1 | 4.37 |
| 満足げ | 1 | 4.01 |
| ご参考まで | 1 | 6.39 |
| 総合 | 1 | 4.05 |
| 行儀作法 | 1 | 5.34 |
| 土地 | 1 | 3.22 |
| っこ | 1 | 5.04 |
| 特注 | 1 | 4.66 |
| 黒焦げ | 1 | 4.74 |
| バカを言え | 1 | 6.11 |
| 純情 | 1 | 4.76 |
| 様だ | 1 | 3.55 |
| 猜疑心 | 1 | 4.99 |
| 職場 | 1 | 4.10 |
| 分かれる | 1 | 3.99 |
| 幼き | 1 | 4.44 |
| おやすいご用 | 1 | 6.61 |
| 躊躇う | 1 | 3.79 |
| 妻子 | 1 | 4.71 |
| 訝げ | 1 | 5.00 |
| 自意識過剰 | 1 | 4.79 |
| 三階 | 1 | 4.07 |
| 時刻 | 1 | 3.65 |
| 声量 | 1 | 4.55 |
| たらしい | 1 | 4.18 |
| 掘る | 1 | 3.59 |
| 垂涎 | 1 | 5.08 |
| 眼力 | 1 | 4.69 |
| 寝溜め | 1 | 6.36 |
| 隣り | 1 | 4.37 |
| いい話 | 1 | 4.57 |
| 値する | 1 | 3.94 |
| 見てもらう | 1 | 4.67 |
| 気質 | 1 | 4.16 |
| 取っておき | 1 | 4.45 |
| 如何様 | 1 | 4.80 |
| スーツ | 1 | 3.95 |
| 特異 | 1 | 4.11 |
| 小娘 | 1 | 3.84 |
| 屠る | 1 | 4.01 |
| 何とぞ | 1 | 4.94 |
| ど真ん中 | 1 | 4.84 |
| 組織 | 1 | 3.25 |
| 戦争 | 1 | 3.00 |
| 内部 | 1 | 3.28 |
| 様子をうかがう | 1 | 5.09 |
| 世話をする | 1 | 4.66 |
| 今の今まで | 1 | 4.36 |
| 今日中に | 1 | 4.28 |
| 公称 | 1 | 5.61 |
| どうかしら | 1 | 4.34 |
| はみ出す | 1 | 5.10 |
| 嘆かわしい | 1 | 4.70 |
| 言ったって | 1 | 4.49 |
| どうかしてる | 1 | 4.96 |
| 正午 | 1 | 4.44 |
| 入城 | 1 | 4.93 |
| 結う | 1 | 4.42 |
| 逆もまたしかり | 1 | 6.23 |
| 手本 | 1 | 4.59 |
| ぞんざい | 1 | 4.63 |
| シンと | 1 | 4.69 |
| 居たたまれない | 1 | 4.67 |
| こうやって | 1 | 3.68 |
| 璧 | 1 | 6.03 |
| 誰も彼も | 1 | 4.34 |
| 糖度 | 1 | 5.44 |
| 当てられる | 1 | 4.62 |
| 並 | 1 | 3.70 |
| 思うところがある | 1 | 4.54 |
| 錯綜 | 1 | 5.05 |
| 嘗 | 1 | 4.42 |
| 早る | 1 | 4.24 |
| 背の低い | 1 | 4.59 |
| 爪 | 1 | 3.21 |
| 毎日毎日 | 1 | 4.60 |
| 産業 | 1 | 4.21 |
| 地虫 | 1 | 5.08 |
| 惚気 | 1 | 4.63 |
| どちらかと言うと | 1 | 3.93 |
| 突き放す | 1 | 4.35 |
| 管理官 | 1 | 4.38 |
| 新鮮 | 1 | 3.78 |
| 鏡台 | 1 | 5.09 |
| 屈辱 | 1 | 4.09 |
| 蔑ろにする | 1 | 4.74 |
| 既婚 | 1 | 5.19 |
| 真っ暗 | 1 | 3.97 |
| 直刃 | 1 | 5.24 |
| 遙か | 1 | 3.87 |
| 口の端 | 1 | 4.08 |
| 境 | 1 | 4.09 |
| 押し通す | 1 | 4.51 |
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