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 |
|---|---|---|
| 大騒動 | 2 | 4.97 |
| ここに来て | 2 | 3.84 |
| 概念 | 2 | 3.76 |
| 恐るべし | 2 | 4.65 |
| 掲げる | 2 | 3.37 |
| そうさ | 2 | 3.93 |
| 綺羅 | 2 | 4.04 |
| ならぬ | 2 | 3.59 |
| 敷地内 | 2 | 4.18 |
| っす | 2 | 3.15 |
| 血の気 | 2 | 4.13 |
| 前触れ | 2 | 4.44 |
| 協力的 | 2 | 4.55 |
| 怪しい | 2 | 3.32 |
| 尻 | 2 | 3.75 |
| 四角 | 2 | 4.79 |
| 世過ぎ | 2 | 5.45 |
| 大ごと | 2 | 5.00 |
| お客様 | 2 | 3.74 |
| 造形 | 2 | 4.40 |
| 外出 | 2 | 4.05 |
| 事例 | 2 | 4.35 |
| 厄介 | 2 | 3.27 |
| 缶 | 2 | 4.43 |
| 雄々しい | 2 | 4.58 |
| 随伴 | 2 | 4.55 |
| 唄 | 2 | 4.32 |
| 何やかんや | 2 | 4.67 |
| お通し | 2 | 4.95 |
| 道具 | 2 | 3.19 |
| 訊ね | 2 | 4.21 |
| 見受ける | 2 | 3.93 |
| 幼芽 | 2 | 3.74 |
| そうすると | 2 | 3.89 |
| エロい | 2 | 4.47 |
| 従順 | 2 | 4.30 |
| おっほん | 2 | 5.72 |
| 親族 | 2 | 4.12 |
| 開き | 2 | 3.45 |
| 富 | 2 | 3.79 |
| 目覚め | 2 | 3.78 |
| 信用 | 2 | 3.34 |
| 出掛け | 2 | 4.36 |
| もんか | 2 | 4.03 |
| 独立 | 2 | 3.90 |
| 傷つける | 2 | 3.50 |
| 垂れる | 2 | 4.07 |
| 調整 | 2 | 3.40 |
| 初心者 | 2 | 3.76 |
| 脾 | 2 | 4.86 |
| 手甲 | 2 | 4.05 |
| 大歓迎 | 2 | 4.15 |
| 駆る | 2 | 3.85 |
| 詰め手 | 2 | 5.08 |
| おはようございます | 2 | 3.74 |
| 一日目 | 2 | 4.64 |
| どさくさに紛れて | 2 | 4.78 |
| 早朝 | 2 | 3.84 |
| 正々堂々 | 2 | 4.43 |
| にしては | 2 | 3.42 |
| 言うに及ばず | 2 | 5.01 |
| 思い切り | 2 | 3.85 |
| その為 | 2 | 2.87 |
| 辺り | 2 | 3.04 |
| 毛深い | 2 | 5.23 |
| 述べる | 2 | 3.41 |
| ウサギ | 2 | 3.75 |
| 感心 | 2 | 3.34 |
| 三角形 | 2 | 4.67 |
| 経て | 2 | 3.83 |
| 生憎 | 2 | 3.80 |
| 飛び跳ねる | 2 | 4.19 |
| 地上 | 2 | 3.10 |
| 閉める | 2 | 3.66 |
| 褒美 | 2 | 4.04 |
| 巨躯 | 2 | 4.09 |
| 笑える | 2 | 3.85 |
| 悪さ | 2 | 3.79 |
| 祈り | 2 | 3.60 |
| 申し入れ | 2 | 4.70 |
| 細め | 2 | 3.57 |
| 否々 | 2 | 3.79 |
| 空中 | 2 | 3.16 |
| 長方形 | 2 | 4.52 |
| 型 | 2 | 3.01 |
| 腕前 | 2 | 3.92 |
| 二本 | 2 | 3.56 |
| 認定 | 2 | 3.99 |
| 配慮 | 2 | 3.66 |
| これ位 | 2 | 3.58 |
| ギリギリ | 2 | 3.53 |
| 些細 | 2 | 3.89 |
| 豚 | 2 | 3.52 |
| 吐き捨てる | 2 | 4.08 |
| ちぇ | 2 | 4.85 |
| 子ども扱い | 2 | 4.91 |
| 悲惨 | 2 | 4.13 |
| 三周忌 | 2 | 7.05 |
| ソーサー | 2 | 4.94 |
| 看る | 2 | 3.94 |
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