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 |
|---|---|---|
| 弱み | 1 | 4.27 |
| やり過ぎ | 1 | 4.38 |
| 煽てる | 1 | 5.58 |
| 千切る | 1 | 5.20 |
| 有り難がる | 1 | 5.59 |
| お守り | 1 | 3.91 |
| 早寝 | 1 | 5.84 |
| 叶わぬ | 1 | 4.46 |
| プッツン | 1 | 5.70 |
| 久方ぶり | 1 | 4.44 |
| 呼び方 | 1 | 4.05 |
| 名礼 | 1 | 3.69 |
| 手を伸ばす | 1 | 3.83 |
| ネーミング | 1 | 4.54 |
| 連日 | 1 | 4.25 |
| 口づけ | 1 | 4.34 |
| 刻み込む | 1 | 4.27 |
| 甚振る | 1 | 4.82 |
| 停滞 | 1 | 3.92 |
| 満足のいく | 1 | 4.93 |
| 小隊 | 1 | 3.70 |
| 芯 | 1 | 4.04 |
| しろと言う | 1 | 4.32 |
| 繰り返す | 1 | 3.34 |
| メイド服 | 1 | 3.99 |
| 傷み入る | 1 | 5.84 |
| 比喩 | 1 | 4.55 |
| 妊む | 1 | 5.08 |
| 厳しさ | 1 | 4.58 |
| 見れる | 1 | 3.74 |
| 羽ペン | 1 | 4.76 |
| 一目散に | 1 | 4.38 |
| 巻き毛 | 1 | 4.93 |
| 赤っ恥 | 1 | 5.54 |
| 黒焦げ | 1 | 4.74 |
| わっ | 1 | 3.63 |
| 漏れなく | 1 | 4.65 |
| 繋がり | 1 | 3.49 |
| ぐったり | 1 | 4.04 |
| 大粒 | 1 | 4.41 |
| 勝ち越し | 1 | 5.58 |
| 昇り | 1 | 4.37 |
| 右脇 | 1 | 5.31 |
| 突きだす | 1 | 4.79 |
| 数万 | 1 | 4.37 |
| 沈痛 | 1 | 4.62 |
| 決定権 | 1 | 4.75 |
| 屈指 | 1 | 4.45 |
| もたれ掛かる | 1 | 5.05 |
| 雇われ | 1 | 4.26 |
| 足蹴り | 1 | 6.02 |
| 偏見 | 1 | 4.33 |
| 替わる | 1 | 4.67 |
| 干渉 | 1 | 3.54 |
| 近隣 | 1 | 3.99 |
| 現実的 | 1 | 4.03 |
| 蔑む | 1 | 4.22 |
| 数少ない | 1 | 4.00 |
| 余りに | 1 | 3.33 |
| 乾いた | 1 | 3.83 |
| 探り | 1 | 4.11 |
| ベンチ | 1 | 3.93 |
| 権限 | 1 | 3.80 |
| 抜きんでる | 1 | 5.22 |
| 先手 | 1 | 4.22 |
| 勝者 | 1 | 4.05 |
| 空しく | 1 | 4.54 |
| 魔 | 1 | 2.55 |
| 愚直 | 1 | 4.65 |
| 幸いにも | 1 | 4.21 |
| 何時ぞや | 1 | 4.53 |
| 愛する | 1 | 3.63 |
| あぶねー | 1 | 5.50 |
| 第三 | 1 | 3.46 |
| 刺々 | 1 | 5.02 |
| 就寝 | 1 | 4.30 |
| 重量 | 1 | 3.65 |
| ハッスル | 1 | 5.20 |
| いい事 | 1 | 3.82 |
| 下記 | 1 | 4.02 |
| 都道 | 1 | 4.19 |
| 玄関先 | 1 | 4.69 |
| 滞り | 1 | 5.21 |
| 勇断 | 1 | 5.61 |
| それじゃあ | 1 | 3.25 |
| 一糸乱れぬ | 1 | 4.85 |
| 連発 | 1 | 4.24 |
| 身受け | 1 | 6.14 |
| チョップ | 1 | 4.66 |
| 鞭 | 1 | 3.67 |
| ってね | 1 | 4.21 |
| 絶対数 | 1 | 5.06 |
| 当てずっぽう | 1 | 5.14 |
| 追いやる | 1 | 4.06 |
| 見下す | 1 | 3.89 |
| 極める | 1 | 4.04 |
| つらく当たる | 1 | 6.26 |
| 取りやめ | 1 | 5.06 |
| とりつく島もない | 1 | 5.91 |
| 家財道具 | 1 | 5.22 |
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