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 |
|---|---|---|
| 多対多 | 2 | 5.09 |
| お役目 | 2 | 4.66 |
| おっほん | 2 | 5.72 |
| 休息 | 2 | 3.89 |
| 変わった | 2 | 3.19 |
| 押さえる | 2 | 3.76 |
| 強大 | 2 | 3.66 |
| つ | 2 | 3.24 |
| おおい | 2 | 4.63 |
| 事例 | 2 | 4.35 |
| 気心 | 2 | 4.91 |
| 列 | 2 | 3.71 |
| 低雲 | 2 | 5.15 |
| 墨 | 2 | 4.13 |
| 吸い込む | 2 | 3.64 |
| 賢明 | 2 | 4.35 |
| 人事 | 2 | 4.37 |
| おどろおどろしい | 2 | 4.89 |
| 飽きる | 2 | 3.89 |
| 手近 | 2 | 4.30 |
| 気楽 | 2 | 3.87 |
| こうなると | 2 | 4.11 |
| つか | 2 | 3.81 |
| ああ言う | 2 | 3.88 |
| 応じて | 2 | 4.22 |
| 五百 | 2 | 3.83 |
| 目が合う | 2 | 4.17 |
| 最上階 | 2 | 4.28 |
| 申し入れ | 2 | 4.70 |
| 煮えたぎる | 2 | 4.91 |
| 支え | 2 | 3.37 |
| 敷地 | 2 | 4.06 |
| 偉大 | 2 | 3.79 |
| 城外 | 2 | 4.92 |
| 友好関係 | 2 | 4.56 |
| 心から | 2 | 3.54 |
| シャツ | 2 | 3.89 |
| どうなってる | 2 | 4.26 |
| せずに | 2 | 3.22 |
| ツンツン | 2 | 4.64 |
| 足の踏み場もない | 2 | 5.53 |
| 少数 | 2 | 3.90 |
| はーい | 2 | 3.77 |
| 交遊 | 2 | 5.43 |
| 据える | 2 | 4.01 |
| 道具 | 2 | 3.19 |
| お帰りなさい | 2 | 3.97 |
| 訂正 | 2 | 3.90 |
| じゃねえ | 2 | 3.34 |
| 稽古 | 2 | 3.76 |
| 当人 | 2 | 3.82 |
| 一任 | 2 | 4.38 |
| テーブル席 | 2 | 4.85 |
| 無傷 | 2 | 3.76 |
| 聴き | 2 | 4.61 |
| 仇討ち | 2 | 4.95 |
| 荒野 | 2 | 3.88 |
| 愚考 | 2 | 4.89 |
| 唱える | 2 | 3.44 |
| 喉 | 2 | 3.27 |
| 分厚い | 2 | 3.77 |
| 仰ぐ | 2 | 3.63 |
| さえあれば | 2 | 3.98 |
| ラズベリー | 2 | 5.37 |
| 悪意 | 2 | 3.67 |
| 馬 | 2 | 2.75 |
| 叙する | 2 | 5.57 |
| 至近距離 | 2 | 4.02 |
| ジロリ | 2 | 4.96 |
| ねじ伏せる | 2 | 4.53 |
| 権利 | 2 | 3.65 |
| よくよく | 2 | 3.89 |
| 謎 | 2 | 3.29 |
| 人差し指 | 2 | 3.82 |
| 泥 | 2 | 3.67 |
| ただ一つ | 2 | 4.05 |
| ヤバイ | 2 | 4.01 |
| 招集 | 2 | 4.31 |
| 必定 | 2 | 4.94 |
| 心外 | 2 | 4.31 |
| 久しぶり | 2 | 3.40 |
| 何時かは | 2 | 3.89 |
| 弱 | 2 | 3.83 |
| ってのは | 2 | 3.25 |
| 悪のり | 2 | 5.91 |
| いつになったら | 2 | 4.74 |
| やらかす | 2 | 3.74 |
| 視界 | 2 | 2.97 |
| 世間 | 2 | 3.83 |
| 世路 | 2 | 3.93 |
| 反抗 | 2 | 4.17 |
| 必ずしも | 2 | 4.10 |
| 大それた | 2 | 4.67 |
| 一目瞭然 | 2 | 4.27 |
| エロい | 2 | 4.47 |
| 選択 | 2 | 3.26 |
| 沖 | 2 | 3.65 |
| これまた | 2 | 3.87 |
| 明後日 | 2 | 3.81 |
| 頬袋 | 2 | 5.48 |
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