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 |
|---|---|---|
| 艶めかしい | 1 | 4.94 |
| 連れて行く | 1 | 4.00 |
| 気はない | 1 | 3.75 |
| 装飾品 | 1 | 4.06 |
| 交じり | 1 | 3.95 |
| 即ち | 1 | 4.07 |
| 子ら | 1 | 4.62 |
| 物珍しい | 1 | 4.36 |
| 早る | 1 | 4.24 |
| ぷっと | 1 | 5.04 |
| 果て | 1 | 3.75 |
| 空耳 | 1 | 4.97 |
| 福利厚生 | 1 | 5.30 |
| くんない | 1 | 4.84 |
| 参加資格 | 1 | 5.33 |
| 建 | 1 | 4.09 |
| 自惚れる | 1 | 5.08 |
| こと無く | 1 | 3.11 |
| 認知度 | 1 | 5.40 |
| 行き過ぎ | 1 | 4.80 |
| 振るう | 1 | 3.18 |
| 疑惧 | 1 | 5.47 |
| 真っ白 | 1 | 3.65 |
| 三者 | 1 | 4.75 |
| 世情 | 1 | 5.24 |
| 着衣 | 1 | 4.95 |
| これを以て | 1 | 5.48 |
| そそる | 1 | 4.54 |
| 猶予 | 1 | 4.18 |
| 縛り | 1 | 4.25 |
| 仲のよい | 1 | 5.54 |
| 三世 | 1 | 4.18 |
| 反対側 | 1 | 3.76 |
| 不義理 | 1 | 4.87 |
| 半額 | 1 | 4.80 |
| 止めておく | 1 | 4.62 |
| 死臭 | 1 | 5.05 |
| 軍事会議 | 1 | 6.45 |
| 七割 | 1 | 4.60 |
| 親子 | 1 | 3.74 |
| 在らせられる | 1 | 4.77 |
| 遠位 | 1 | 7.29 |
| 鈍くさい | 1 | 5.31 |
| 分裂 | 1 | 4.07 |
| 品のよい | 1 | 6.01 |
| 商店 | 1 | 4.05 |
| 雑多 | 1 | 4.42 |
| 画工 | 1 | 4.11 |
| 所有 | 1 | 3.86 |
| 稀に見る | 1 | 5.13 |
| 歯入れ | 1 | 4.63 |
| 平身低頭 | 1 | 5.16 |
| 取り巻く | 1 | 4.25 |
| 説得力 | 1 | 4.06 |
| けり | 1 | 4.97 |
| 壮観 | 1 | 4.62 |
| 何とやら | 1 | 4.92 |
| 浮いた | 1 | 4.17 |
| 処置 | 1 | 3.99 |
| 毛羽 | 1 | 5.18 |
| 郷土料理 | 1 | 5.25 |
| 玄関 | 1 | 3.59 |
| 落 | 1 | 4.45 |
| 常日頃 | 1 | 4.52 |
| 事となる | 1 | 3.96 |
| 二十六 | 1 | 4.84 |
| ブッ | 1 | 4.65 |
| 一致 | 1 | 3.86 |
| ドキッと | 1 | 4.68 |
| 急使 | 1 | 5.42 |
| 鼓膜 | 1 | 4.35 |
| 厚紙 | 1 | 5.44 |
| 定例 | 1 | 5.00 |
| 突き放す | 1 | 4.35 |
| 巻き毛 | 1 | 4.93 |
| 何があっても | 1 | 4.21 |
| 屈辱 | 1 | 4.09 |
| 参謀 | 1 | 3.98 |
| ほざく | 1 | 4.44 |
| 血のつながった | 1 | 5.51 |
| 瞬殺 | 1 | 4.82 |
| 我が妻 | 1 | 5.18 |
| 切 | 1 | 3.67 |
| 気張る | 1 | 4.85 |
| お姫様 | 1 | 3.64 |
| もう一人 | 1 | 3.48 |
| 見下す | 1 | 3.89 |
| 引けをとらない | 1 | 5.51 |
| 膨らむ | 1 | 3.63 |
| 泄れ | 1 | 4.92 |
| 幾分 | 1 | 4.07 |
| ばかりでなく | 1 | 4.53 |
| 意志薄弱 | 1 | 5.96 |
| 湯種 | 1 | 5.32 |
| 何故なら | 1 | 3.52 |
| 直後 | 1 | 3.18 |
| 二言三言 | 1 | 5.12 |
| 厚朴 | 1 | 4.59 |
| 風情 | 1 | 3.99 |
| 追い返す | 1 | 4.28 |
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