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 |
|---|---|---|
| 十五 | 1 | 3.70 |
| ひとっ飛び | 1 | 5.18 |
| 基づく | 1 | 4.44 |
| 引き締め | 1 | 4.07 |
| 視認 | 1 | 4.08 |
| 支度 | 1 | 3.95 |
| お知らせ | 1 | 4.09 |
| 真相 | 1 | 4.09 |
| 吹き込む | 1 | 4.23 |
| 秘密 | 1 | 3.31 |
| 軍旗 | 1 | 4.90 |
| 不死 | 1 | 3.80 |
| 手放す | 1 | 3.83 |
| 乙女チック | 1 | 5.41 |
| 目が行く | 1 | 5.31 |
| そそくさ | 1 | 4.24 |
| 伏す | 1 | 4.60 |
| 王位 | 1 | 4.05 |
| 永久 | 1 | 4.27 |
| 依托 | 1 | 4.68 |
| 欠航 | 1 | 3.74 |
| ドジっこ | 1 | 6.99 |
| 同性 | 1 | 4.35 |
| 急報 | 1 | 5.16 |
| 行事 | 1 | 4.17 |
| 厚朴 | 1 | 4.59 |
| 享ける | 1 | 5.09 |
| 高確率 | 1 | 4.71 |
| 画竜点睛を欠く | 1 | 6.30 |
| 初々しい | 1 | 4.71 |
| 塗工 | 1 | 4.13 |
| 暖かい | 1 | 3.67 |
| 直後 | 1 | 3.18 |
| 取っかえ引っかえ | 1 | 5.65 |
| 聞き流す | 1 | 4.07 |
| 揉める | 1 | 4.27 |
| 断然 | 1 | 4.47 |
| 下級 | 1 | 3.78 |
| 剛毅 | 1 | 5.05 |
| 女王 | 1 | 3.17 |
| 学理 | 1 | 4.81 |
| に比べ | 1 | 3.73 |
| さくさく | 1 | 4.93 |
| 紅一点 | 1 | 5.23 |
| 大正 | 1 | 5.28 |
| 鉈目 | 1 | 4.24 |
| しっぽり | 1 | 5.53 |
| 鬼気迫る | 1 | 4.55 |
| 押し通す | 1 | 4.51 |
| さす | 1 | 4.26 |
| 平身低頭 | 1 | 5.16 |
| 下準備 | 1 | 4.44 |
| 鼻で笑う | 1 | 4.49 |
| はいはい | 1 | 3.62 |
| 弁解 | 1 | 4.43 |
| 屈辱 | 1 | 4.09 |
| 試しに | 1 | 3.89 |
| シュール | 1 | 4.48 |
| 鬱 | 1 | 4.80 |
| 一変 | 1 | 4.08 |
| バー | 1 | 3.69 |
| 対極 | 1 | 4.74 |
| 極み | 1 | 4.29 |
| 毎朝 | 1 | 4.38 |
| アイデンティティ | 1 | 5.10 |
| 心細い | 1 | 4.40 |
| 名を連ねる | 1 | 4.93 |
| たっぷり | 1 | 3.52 |
| 続々 | 1 | 4.22 |
| 親離れ | 1 | 5.42 |
| 同席者 | 1 | 5.89 |
| 恩を売る | 1 | 4.96 |
| 当 | 1 | 4.11 |
| 吃り | 1 | 4.93 |
| 耐性 | 1 | 3.20 |
| 上達 | 1 | 4.21 |
| 紛れもない | 1 | 4.37 |
| 猛禽 | 1 | 4.86 |
| 世界中 | 1 | 3.84 |
| 山積み | 1 | 4.37 |
| 暴力 | 1 | 3.75 |
| 追い返す | 1 | 4.28 |
| 半身 | 1 | 4.08 |
| 劇的 | 1 | 4.22 |
| 胸中 | 1 | 4.02 |
| からい | 1 | 4.76 |
| 見るも | 1 | 4.39 |
| 忘れられない | 1 | 4.41 |
| 帰属 | 1 | 4.96 |
| じゃねぇ | 1 | 3.48 |
| 寝具 | 1 | 4.36 |
| 凄まじい | 1 | 3.30 |
| ほほ笑み | 1 | 4.91 |
| 生命力 | 1 | 3.12 |
| 微々たるもの | 1 | 4.67 |
| 顔色 | 1 | 3.47 |
| お皿 | 1 | 4.30 |
| 届け | 1 | 3.66 |
| シャンデリア | 1 | 4.57 |
| 魔 | 1 | 2.55 |
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