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 |
|---|---|---|
| 真っ黒 | 3 | 3.92 |
| 帰ってくる | 3 | 3.74 |
| 歳 | 3 | 2.78 |
| 長 | 3 | 2.85 |
| 訪問先 | 3 | 5.63 |
| 傾げる | 3 | 3.21 |
| 有様 | 3 | 3.84 |
| 不味い | 3 | 3.21 |
| 最後まで | 3 | 3.43 |
| 光栄 | 3 | 3.87 |
| 扱う | 3 | 3.21 |
| どれ | 3 | 3.75 |
| における | 3 | 3.46 |
| 声をあげる | 3 | 4.00 |
| 脱兎のごとく | 3 | 5.04 |
| 亡くす | 3 | 4.05 |
| 計画 | 3 | 3.25 |
| 一家 | 3 | 3.91 |
| ごと | 3 | 3.29 |
| 本当のところ | 3 | 4.68 |
| 素敵 | 3 | 3.41 |
| 晒す | 3 | 3.59 |
| サイン | 3 | 3.86 |
| 隙 | 3 | 3.12 |
| 左 | 3 | 3.28 |
| 育つ | 3 | 3.40 |
| プライド | 3 | 3.80 |
| 縁者 | 3 | 4.82 |
| 引き下がる | 3 | 4.06 |
| 七人 | 3 | 4.21 |
| 選出 | 3 | 4.41 |
| 羨ましい | 3 | 3.48 |
| 司会 | 3 | 4.29 |
| 大げさ | 3 | 3.96 |
| 布 | 3 | 3.21 |
| 的屋 | 3 | 4.38 |
| はあっ | 3 | 3.75 |
| 叫び声 | 3 | 3.71 |
| 萎縮 | 3 | 4.48 |
| メニュー | 3 | 3.60 |
| お疲れさま | 3 | 4.25 |
| 又も | 3 | 4.05 |
| かって | 3 | 3.68 |
| 飛び降りる | 3 | 4.03 |
| 遠ざかる | 3 | 3.90 |
| 女性関係 | 3 | 5.01 |
| 習い | 3 | 4.30 |
| 平和主義 | 3 | 5.32 |
| に対し | 3 | 3.21 |
| 身勝手 | 3 | 4.25 |
| お姉 | 3 | 3.30 |
| 上司 | 3 | 3.74 |
| 類 | 3 | 3.25 |
| そこら辺 | 3 | 3.84 |
| 避け | 3 | 3.12 |
| 乱暴 | 3 | 3.73 |
| 成るべく | 3 | 3.53 |
| 血走る | 3 | 4.24 |
| 腰を折る | 3 | 5.29 |
| 字 | 3 | 3.69 |
| とさ | 3 | 3.33 |
| 権勢 | 3 | 4.62 |
| ドン引き | 3 | 4.20 |
| 負担 | 3 | 3.51 |
| 仁王立ち | 3 | 4.28 |
| 家僕 | 3 | 6.21 |
| 威力 | 3 | 3.03 |
| その頃 | 3 | 3.75 |
| 自画像 | 3 | 6.08 |
| 御代 | 3 | 5.31 |
| つつも | 3 | 3.23 |
| 僅かに | 3 | 3.13 |
| 威厳 | 3 | 3.92 |
| 容器 | 3 | 4.13 |
| 一層 | 3 | 3.84 |
| あるらしい | 3 | 3.61 |
| 他愛のない | 3 | 4.75 |
| 見惚れる | 3 | 4.04 |
| 返事 | 3 | 2.98 |
| 主な | 3 | 3.97 |
| 薩埵 | 3 | 5.33 |
| 艶 | 3 | 3.84 |
| 娘さん | 3 | 3.99 |
| 頭を下げる | 3 | 3.46 |
| 泣き | 3 | 3.33 |
| 腰掛け | 3 | 4.00 |
| 押しつけ | 3 | 4.20 |
| 身長 | 3 | 3.45 |
| 勇気 | 3 | 3.56 |
| 知らず | 3 | 3.68 |
| そちら | 3 | 3.02 |
| 損ねる | 3 | 4.06 |
| 踏み入る | 3 | 4.52 |
| だり | 3 | 3.41 |
| ふふふ | 3 | 3.50 |
| 害する | 3 | 4.39 |
| 美青年 | 3 | 4.77 |
| 出席 | 3 | 3.87 |
| その手 | 3 | 3.34 |
| 台無し | 3 | 4.04 |
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