Yamagishi Kyoji, a high school student helping with his family's convenience store in Okutama, suffers a serious injury one day due to the effects of "Erosion" inside the store. After being transported to a hospital where he is healed by magic, Kyoji is drawn to jump into the "Erosion's Mouth" and discovers a labyrinth beyond it. A dungeon that suddenly appears in the modern world. And from the Erosion's Mouth, magical essence "Mana" overflows, giving birth to magic users and a new profession called "Adventurer." Materials that drop from within the dungeon are utilized in modern science, creating new industries, and the world gradually comes to understand the "Adventurer" profession.
| Word | Frequency | Difficulty |
|---|---|---|
| 問題点 | 3 | 4.29 |
| 鋳造 | 3 | 4.70 |
| 焼き物 | 3 | 4.88 |
| 追加 | 3 | 3.31 |
| ハラ | 3 | 5.07 |
| 幾つも | 3 | 3.39 |
| 飛び | 3 | 3.52 |
| 版 | 3 | 3.77 |
| 実 | 3 | 3.37 |
| 数年 | 3 | 3.75 |
| ようにする | 3 | 3.59 |
| 占める | 3 | 3.97 |
| 手品 | 3 | 4.68 |
| 甘い | 3 | 3.09 |
| 何やら | 3 | 3.19 |
| 抑え | 3 | 3.28 |
| 死人 | 3 | 3.99 |
| 入社 | 3 | 4.97 |
| 同意書 | 3 | 5.49 |
| 硬度 | 3 | 4.42 |
| あら | 3 | 3.12 |
| ブンブン | 3 | 4.41 |
| たん | 3 | 3.48 |
| 警視庁 | 3 | 5.28 |
| 引っ越す | 3 | 4.68 |
| オート | 3 | 4.80 |
| たら | 3 | 3.78 |
| 三階 | 3 | 4.07 |
| 速く | 3 | 3.79 |
| 難敵 | 3 | 4.72 |
| 土 | 3 | 2.90 |
| 度に | 3 | 3.36 |
| 貫く | 3 | 3.25 |
| 基本的 | 3 | 4.03 |
| 度々 | 3 | 3.93 |
| 長居 | 3 | 4.34 |
| 勢い | 3 | 2.99 |
| 障壁 | 3 | 3.46 |
| 臨床研修 | 3 | 6.99 |
| 翌年 | 3 | 4.91 |
| 残念なことに | 3 | 4.41 |
| 溢れる | 3 | 3.55 |
| 九時 | 3 | 4.71 |
| レーサー | 3 | 5.61 |
| モーター | 3 | 5.01 |
| 危機 | 3 | 3.52 |
| 脇腹 | 3 | 3.94 |
| 保管 | 3 | 3.85 |
| 始め | 3 | 3.31 |
| がね | 3 | 3.58 |
| 照れ | 3 | 3.61 |
| 晴れて | 3 | 4.13 |
| 鈍らす | 3 | 6.57 |
| 夕方 | 3 | 3.59 |
| あっさり | 3 | 3.15 |
| 目を丸くする | 3 | 4.22 |
| ジュース | 3 | 3.99 |
| プラチナ | 3 | 4.40 |
| 新卒 | 3 | 5.76 |
| ビキニ | 3 | 4.64 |
| 割 | 3 | 3.87 |
| ふっと | 3 | 3.77 |
| 来月 | 3 | 4.45 |
| 現金 | 3 | 4.23 |
| 脳 | 3 | 3.60 |
| ラテン語 | 3 | 5.53 |
| ヘリポート | 3 | 5.65 |
| 軍医 | 3 | 5.07 |
| 調べる | 3 | 3.30 |
| とすると | 3 | 3.56 |
| 知財 | 3 | 6.59 |
| 要は | 3 | 3.72 |
| 立ち入り | 3 | 4.56 |
| チャーター機 | 3 | 6.89 |
| お約束 | 3 | 4.07 |
| まとめ | 3 | 4.00 |
| 堂々 | 3 | 3.53 |
| 電源 | 3 | 4.52 |
| 貴重 | 3 | 3.50 |
| 覗く | 3 | 3.34 |
| ご無沙汰 | 3 | 4.40 |
| 完璧 | 3 | 3.31 |
| 着衣 | 3 | 4.95 |
| そよ風 | 3 | 4.65 |
| つい | 3 | 3.19 |
| いいね | 3 | 3.98 |
| あり得ない | 3 | 3.35 |
| 越す | 3 | 3.95 |
| 味 | 3 | 3.06 |
| これ程 | 3 | 3.39 |
| 踏襲 | 3 | 5.01 |
| お互い | 3 | 3.30 |
| 逸話 | 3 | 4.33 |
| と金 | 3 | 4.40 |
| コース | 3 | 3.93 |
| 克服 | 3 | 4.32 |
| にて | 3 | 3.20 |
| 13 | 3 | 3.87 |
| ゴーグル | 3 | 4.64 |
| 吭 | 3 | 3.81 |
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