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 |
|---|---|---|
| 睨みつける | 3 | 3.53 |
| 嫁ぐ | 3 | 3.78 |
| 暖か | 3 | 3.55 |
| がっつり | 3 | 4.57 |
| 触れ | 3 | 3.33 |
| 余りにも | 3 | 3.24 |
| 畏まりました | 3 | 3.72 |
| 熱源 | 3 | 4.91 |
| 落ち着き | 3 | 3.71 |
| 摸する | 3 | 3.34 |
| 社交室 | 3 | 6.81 |
| 張る | 3 | 3.09 |
| 良いとして | 3 | 4.23 |
| 示し | 3 | 3.48 |
| ご自身 | 3 | 4.42 |
| 呟き | 3 | 3.31 |
| 為 | 3 | 2.86 |
| 抵抗 | 3 | 2.84 |
| またしても | 3 | 3.96 |
| 予定通り | 3 | 3.81 |
| チラチラ | 3 | 4.14 |
| 外見 | 3 | 3.45 |
| 二部 | 3 | 5.08 |
| 勉強 | 3 | 3.22 |
| 一層 | 3 | 3.84 |
| 腑に落ちない | 3 | 4.53 |
| 気持ちいい | 3 | 4.07 |
| 解決 | 3 | 3.27 |
| 若君 | 3 | 4.88 |
| ニヤニヤ | 3 | 3.81 |
| 客 | 3 | 3.29 |
| 布 | 3 | 3.21 |
| 脱兎のごとく | 3 | 5.04 |
| 生える | 3 | 3.27 |
| 自画像 | 3 | 6.08 |
| 反撃 | 3 | 3.52 |
| 深刻 | 3 | 3.83 |
| 防御 | 3 | 3.09 |
| 然 | 3 | 3.99 |
| 想定 | 3 | 3.45 |
| 厨房 | 3 | 3.70 |
| 若しくは | 3 | 3.38 |
| 恵まれる | 3 | 3.79 |
| 仁王立ち | 3 | 4.28 |
| 一対 | 3 | 4.48 |
| 子なし | 3 | 3.78 |
| 顔見知り | 3 | 4.10 |
| 躊躇い | 3 | 3.91 |
| ご協力 | 3 | 4.55 |
| はずです | 3 | 3.45 |
| 普段から | 3 | 3.83 |
| 隙 | 3 | 3.12 |
| 愛妻家 | 3 | 5.18 |
| まとめ | 3 | 4.00 |
| 知らず | 3 | 3.68 |
| 点検 | 3 | 4.41 |
| 心の底 | 3 | 3.81 |
| 追って | 3 | 3.40 |
| 氷枕 | 3 | 5.89 |
| 感触 | 3 | 3.37 |
| あい | 3 | 3.89 |
| 常 | 3 | 3.15 |
| 却って | 3 | 3.83 |
| じ | 3 | 3.54 |
| ドン引き | 3 | 4.20 |
| 見ほれる | 3 | 5.88 |
| んー | 3 | 3.43 |
| 吹っ飛ぶ | 3 | 3.76 |
| 分かれ | 3 | 3.55 |
| における | 3 | 3.46 |
| 遅れる | 3 | 3.60 |
| 真っ黒 | 3 | 3.92 |
| 明け透け | 3 | 4.96 |
| 主な | 3 | 3.97 |
| m | 3 | 3.51 |
| 駆け込む | 3 | 4.16 |
| 稀少 | 3 | 4.49 |
| 一瞥 | 3 | 3.77 |
| 面白い | 3 | 2.98 |
| 鳥目 | 3 | 5.93 |
| 凄い | 3 | 2.72 |
| あの方 | 3 | 3.73 |
| あちこち | 3 | 3.50 |
| 過ぎ | 3 | 3.12 |
| と言うことだ | 3 | 3.24 |
| 破れる | 3 | 4.19 |
| 奇妙 | 3 | 3.51 |
| 知り合う | 3 | 4.06 |
| 体高 | 3 | 4.99 |
| 頷き | 3 | 3.24 |
| 苛々 | 3 | 4.72 |
| 将来 | 3 | 3.44 |
| 披露 | 3 | 3.81 |
| 姫君 | 3 | 3.95 |
| 上回る | 3 | 3.67 |
| 誠実 | 3 | 4.09 |
| 凝視 | 3 | 3.85 |
| 最後まで | 3 | 3.43 |
| ご無沙汰 | 3 | 4.40 |
| 御代 | 3 | 5.31 |
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