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 |
|---|---|---|
| 地主 | 1 | 5.11 |
| 一名 | 1 | 4.35 |
| いずれは | 1 | 4.02 |
| 点滴 | 1 | 5.05 |
| にせよ | 1 | 3.90 |
| 帰れ | 1 | 3.97 |
| 藻塩 | 1 | 5.16 |
| 手助け | 1 | 3.93 |
| 個人事業主 | 1 | 6.13 |
| 出自 | 1 | 4.20 |
| ロスアンゼルス | 1 | 6.78 |
| 正 | 1 | 3.56 |
| 絶命 | 1 | 4.07 |
| 辛抱 | 1 | 4.48 |
| 1ヶ所 | 1 | 5.79 |
| 整骨院 | 1 | 6.99 |
| イタチ | 1 | 4.64 |
| 腸 | 1 | 4.49 |
| お飾り | 1 | 4.52 |
| 外科 | 1 | 5.23 |
| 海岸 | 1 | 4.17 |
| 気候 | 1 | 4.23 |
| 兵隊 | 1 | 4.07 |
| 苦しむ | 1 | 3.67 |
| 案件 | 1 | 3.94 |
| いいところ | 1 | 4.00 |
| 膨れる | 1 | 4.58 |
| 何なり | 1 | 4.71 |
| 奮戦 | 1 | 4.43 |
| 増し | 1 | 4.05 |
| 四重 | 1 | 5.23 |
| びっちり | 1 | 5.54 |
| 釣られる | 1 | 4.51 |
| 後じさり | 1 | 6.07 |
| 短め | 1 | 4.37 |
| 決定的 | 1 | 3.96 |
| 何時ものごとく | 1 | 5.19 |
| 面持ち | 1 | 3.65 |
| 人的被害 | 1 | 4.99 |
| 関係者 | 1 | 3.56 |
| 行程 | 1 | 4.49 |
| 引き入れる | 1 | 4.43 |
| 五人組 | 1 | 5.18 |
| 各駅 | 1 | 6.64 |
| ぽんぽん | 1 | 4.28 |
| 二曹 | 1 | 3.26 |
| マッチョ | 1 | 4.47 |
| 大急ぎ | 1 | 4.45 |
| 道路上 | 1 | 6.18 |
| メモ | 1 | 3.86 |
| 突っ込む | 1 | 3.15 |
| 自動車産業 | 1 | 6.55 |
| 英訳 | 1 | 6.27 |
| 不急 | 1 | 6.89 |
| 農作業 | 1 | 4.42 |
| 強さ | 1 | 3.16 |
| 芳しい | 1 | 4.50 |
| 円柱 | 1 | 4.83 |
| 領 | 1 | 2.92 |
| 造りあげる | 1 | 6.05 |
| 募る | 1 | 3.96 |
| 焼き肉 | 1 | 4.74 |
| 十日 | 1 | 4.05 |
| 気にくわない | 1 | 4.97 |
| 今のまま | 1 | 4.14 |
| 裏付け | 1 | 4.56 |
| 安上がり | 1 | 4.99 |
| じろっと | 1 | 5.54 |
| 休憩所 | 1 | 4.53 |
| 礼 | 1 | 3.28 |
| 本番 | 1 | 3.96 |
| 妖精 | 1 | 3.03 |
| 女たらし | 1 | 5.18 |
| 同意見 | 1 | 4.38 |
| 霊園 | 1 | 5.32 |
| 他国人 | 1 | 5.50 |
| 業務命令 | 1 | 6.13 |
| 早くても | 1 | 4.91 |
| ぐりぐり | 1 | 4.49 |
| 症状 | 1 | 4.00 |
| 握りしめる | 1 | 3.65 |
| 佳い | 1 | 4.52 |
| 答礼 | 1 | 5.21 |
| 金属音 | 1 | 4.17 |
| 向こうっ気 | 1 | 6.75 |
| 二次会 | 1 | 5.34 |
| 妬み | 1 | 4.63 |
| 荷が重い | 1 | 4.77 |
| 人一倍 | 1 | 4.65 |
| 頑張ろう | 1 | 4.05 |
| 没 | 1 | 3.81 |
| かっ飛ばす | 1 | 5.61 |
| 張り詰める | 1 | 4.21 |
| 名前だけ | 1 | 4.34 |
| 丁重 | 1 | 4.25 |
| 歯がゆい | 1 | 4.69 |
| ぺらぺら | 1 | 4.86 |
| ロードスター | 1 | 6.45 |
| 湯上がり | 1 | 5.49 |
| クリーンヒット | 1 | 4.99 |
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