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 |
|---|---|---|
| 投げる | 3 | 3.49 |
| 一目 | 3 | 3.72 |
| 真っ青 | 3 | 3.96 |
| 館 | 3 | 3.38 |
| 最高 | 3 | 3.21 |
| お前たち | 3 | 3.46 |
| のみならず | 3 | 3.98 |
| からいって | 3 | 4.79 |
| 範囲 | 3 | 3.14 |
| 寝台 | 3 | 3.85 |
| いざ | 3 | 3.58 |
| 屋上 | 3 | 3.93 |
| 三回 | 3 | 4.07 |
| 隠れる | 3 | 3.64 |
| 腰を折る | 3 | 5.29 |
| 苦労 | 3 | 3.22 |
| キャットファイト | 3 | 5.69 |
| 残り | 3 | 3.10 |
| 見渡す | 3 | 3.63 |
| 独り寝 | 3 | 6.25 |
| 隙 | 3 | 3.12 |
| 齟齬 | 3 | 4.55 |
| 大切に | 3 | 3.69 |
| あの方 | 3 | 3.73 |
| 想い | 3 | 3.32 |
| 飛んで | 3 | 3.00 |
| 羊 | 3 | 3.94 |
| じ | 3 | 3.54 |
| 一口 | 3 | 3.65 |
| 施す | 3 | 3.52 |
| 一帯 | 3 | 3.90 |
| せめてもの | 3 | 4.30 |
| 奇声 | 3 | 4.34 |
| プライベート | 3 | 4.27 |
| 内装 | 3 | 4.18 |
| ペンダントトップ | 3 | 5.52 |
| エンゼル | 3 | 5.83 |
| 訪問先 | 3 | 5.63 |
| 強制 | 3 | 3.79 |
| 脚 | 3 | 3.41 |
| 元い | 3 | 4.01 |
| 怯える | 3 | 3.71 |
| 肢体 | 3 | 4.40 |
| 戴き | 3 | 3.44 |
| 柄 | 3 | 3.45 |
| 突っこみ | 3 | 4.74 |
| ナンバーワン | 3 | 4.86 |
| 上品 | 3 | 3.98 |
| 使い | 3 | 2.99 |
| 舎利 | 3 | 4.04 |
| 王座 | 3 | 4.53 |
| 兄上 | 3 | 3.54 |
| 前庭 | 3 | 4.88 |
| 手足 | 3 | 3.52 |
| 本当のところ | 3 | 4.68 |
| この人 | 3 | 3.25 |
| 落ち着き | 3 | 3.71 |
| 出席 | 3 | 3.87 |
| この辺り | 3 | 3.42 |
| 自慢 | 3 | 3.55 |
| それもこれも | 3 | 4.36 |
| 後半 | 3 | 3.77 |
| とっくに | 3 | 3.74 |
| 素人 | 3 | 3.52 |
| 騒ぎ | 3 | 3.37 |
| 気をつけ | 3 | 4.41 |
| 年頃 | 3 | 3.81 |
| 黄色い | 3 | 3.95 |
| 反逆 | 3 | 4.38 |
| 両脇 | 3 | 4.12 |
| 翻す | 3 | 4.39 |
| じゃが | 3 | 3.56 |
| 上回る | 3 | 3.67 |
| にこり | 3 | 4.08 |
| 金 | 3 | 2.82 |
| 飛び抜ける | 3 | 4.59 |
| がら | 3 | 4.21 |
| 考慮 | 3 | 3.63 |
| はずです | 3 | 3.45 |
| 万 | 3 | 3.12 |
| 不似合い | 3 | 5.11 |
| 心の底 | 3 | 3.81 |
| 痛み | 3 | 3.05 |
| 二百 | 3 | 3.78 |
| あちこち | 3 | 3.50 |
| 負傷 | 3 | 3.90 |
| 反対意見 | 3 | 4.74 |
| 了解 | 3 | 3.26 |
| 化粧 | 3 | 4.00 |
| 雷 | 3 | 3.06 |
| 好意的 | 3 | 4.09 |
| 選出 | 3 | 4.41 |
| 司会 | 3 | 4.29 |
| 呟き | 3 | 3.31 |
| 飛び込む | 3 | 3.31 |
| 平和主義 | 3 | 5.32 |
| 度 | 3 | 3.32 |
| 写し | 3 | 4.42 |
| 順番に | 3 | 3.98 |
| ままに | 3 | 3.37 |
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