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 |
|---|---|---|
| 脛 | 2 | 4.22 |
| 暴露 | 2 | 4.24 |
| 型 | 2 | 3.01 |
| 涎 | 2 | 4.08 |
| 肯定 | 2 | 3.58 |
| 救う | 2 | 3.16 |
| そうかもしれません | 2 | 4.56 |
| 生憎 | 2 | 3.80 |
| この世 | 2 | 3.50 |
| 順番 | 2 | 3.86 |
| 外す | 2 | 3.17 |
| 麗しい | 2 | 4.16 |
| 動揺 | 2 | 3.31 |
| 思い立つ | 2 | 4.50 |
| 悪のり | 2 | 5.91 |
| 火急 | 2 | 4.94 |
| 前半 | 2 | 4.03 |
| 世話になる | 2 | 4.74 |
| 思わせる | 2 | 3.71 |
| 沢山 | 2 | 2.94 |
| 評判 | 2 | 3.70 |
| 緩み | 2 | 4.39 |
| 考え直す | 2 | 4.34 |
| 世路 | 2 | 3.93 |
| 掃除 | 2 | 3.48 |
| 忍び込む | 2 | 4.17 |
| 銀色 | 2 | 3.70 |
| 目板 | 2 | 3.85 |
| 和らぐ | 2 | 4.32 |
| 咳 | 2 | 4.39 |
| 乾かす | 2 | 4.37 |
| 不明 | 2 | 3.44 |
| 片づけ | 2 | 4.21 |
| 城壁 | 2 | 3.43 |
| どちらにしても | 2 | 4.33 |
| 口喧嘩 | 2 | 4.75 |
| 一周年 | 2 | 5.41 |
| ようし | 2 | 4.82 |
| 胸ぐら | 2 | 4.68 |
| 分類 | 2 | 3.93 |
| と言ってもいい | 2 | 3.85 |
| 属す | 2 | 4.22 |
| 招集 | 2 | 4.31 |
| 思い切り | 2 | 3.85 |
| 汚し | 2 | 4.40 |
| 突き出す | 2 | 3.65 |
| 同時刻 | 2 | 4.86 |
| 左隣 | 2 | 4.80 |
| ぐるりと | 2 | 4.00 |
| 敬称 | 2 | 4.67 |
| 来客 | 2 | 4.14 |
| 白髪 | 2 | 3.98 |
| 馬 | 2 | 2.75 |
| 何なの | 2 | 3.66 |
| 位勲 | 2 | 4.20 |
| 軽蔑 | 2 | 4.31 |
| 放っておく | 2 | 4.13 |
| いい鴨 | 2 | 3.94 |
| 水差し | 2 | 4.58 |
| 透明 | 2 | 3.71 |
| また今度 | 2 | 4.30 |
| 束 | 2 | 3.82 |
| 告白 | 2 | 3.52 |
| 外出 | 2 | 4.05 |
| 下地 | 2 | 4.59 |
| 完了 | 2 | 3.44 |
| でもって | 2 | 3.88 |
| 黒 | 2 | 2.77 |
| 左胸 | 2 | 4.70 |
| 込み | 2 | 3.73 |
| 関わり | 2 | 3.90 |
| 勤まらない | 2 | 5.55 |
| ぼる | 2 | 4.24 |
| いちゃつく | 2 | 4.67 |
| クール | 2 | 4.16 |
| 食い下がる | 2 | 4.39 |
| 比例 | 2 | 4.28 |
| 勇敢 | 2 | 4.28 |
| ランク | 2 | 2.85 |
| 何てこった | 2 | 4.62 |
| 拷問 | 2 | 3.89 |
| 理不尽 | 2 | 3.67 |
| 幼気 | 2 | 4.80 |
| 提出 | 2 | 3.96 |
| 入室 | 2 | 4.07 |
| ハアハア | 2 | 5.11 |
| 書物 | 2 | 3.89 |
| 賛同 | 2 | 3.94 |
| 空 | 2 | 2.69 |
| お仕置き | 2 | 4.07 |
| 外套 | 2 | 3.81 |
| ピンヒール | 2 | 5.72 |
| 閉める | 2 | 3.66 |
| 纏う | 2 | 3.15 |
| 過剰 | 2 | 3.90 |
| 遊ぶ | 2 | 3.13 |
| 螺子 | 2 | 4.56 |
| 踏みつける | 2 | 4.08 |
| 泥地 | 2 | 5.68 |
| 二番目 | 2 | 4.31 |
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