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 |
|---|---|---|
| 譲渡 | 3 | 4.30 |
| ゴーグル | 3 | 4.64 |
| 鋳造 | 3 | 4.70 |
| 休み | 3 | 3.57 |
| スムーズ | 3 | 4.07 |
| 夕日 | 3 | 4.21 |
| 発射 | 3 | 3.70 |
| いっそ | 3 | 3.65 |
| 滅多に | 3 | 3.78 |
| 良さ | 3 | 3.84 |
| 分隊 | 3 | 4.44 |
| ぼろぼろ | 3 | 4.26 |
| 排気ガス | 3 | 5.70 |
| 好評 | 3 | 4.17 |
| 腰 | 3 | 2.88 |
| 温度 | 3 | 3.78 |
| 呪文 | 3 | 3.15 |
| 輸送車 | 3 | 5.12 |
| ってな | 3 | 3.50 |
| この人 | 3 | 3.25 |
| 羽織る | 3 | 3.89 |
| つき合い | 3 | 4.64 |
| 不治の病 | 3 | 5.01 |
| 警視 | 3 | 6.13 |
| 切り替える | 3 | 3.89 |
| 木材 | 3 | 3.90 |
| 写真 | 3 | 3.57 |
| 報告書 | 3 | 3.79 |
| ロシア人 | 3 | 5.49 |
| 絵 | 3 | 3.44 |
| ショウルーム | 3 | 7.11 |
| 信頼性 | 3 | 4.96 |
| 品のいい | 3 | 5.37 |
| 満載 | 3 | 4.34 |
| 平坦 | 3 | 4.32 |
| 特許権 | 3 | 6.15 |
| 画道 | 3 | 3.23 |
| 本気 | 3 | 3.36 |
| ある程度 | 3 | 3.05 |
| 騒ぎ | 3 | 3.37 |
| 代わる | 3 | 3.81 |
| 蒸発 | 3 | 4.25 |
| サーモバリック | 3 | 7.05 |
| カクテル | 3 | 4.85 |
| 替わり | 3 | 4.75 |
| 取り寄せる | 3 | 4.42 |
| ワンワン | 3 | 5.01 |
| 再生 | 3 | 3.44 |
| なさい | 3 | 2.85 |
| 枝 | 3 | 3.45 |
| 色めく | 3 | 4.97 |
| 混乱 | 3 | 3.09 |
| 九時 | 3 | 4.71 |
| 実 | 3 | 3.37 |
| そっくり | 3 | 3.72 |
| 解せる | 3 | 4.60 |
| 影 | 3 | 2.89 |
| 売り上げ | 3 | 4.24 |
| 煩わしい | 3 | 4.35 |
| 官房長官 | 3 | 5.94 |
| 手放す | 3 | 3.83 |
| 揺れ | 3 | 3.49 |
| イギリス | 3 | 4.25 |
| 癒やす | 3 | 4.84 |
| ベンジャミン | 3 | 5.07 |
| 粉砕 | 3 | 3.86 |
| 昼食 | 3 | 3.51 |
| 若気 | 3 | 4.38 |
| 電気自動車 | 3 | 6.22 |
| 経験上 | 3 | 4.79 |
| 真面目 | 3 | 3.25 |
| 12月 | 3 | 4.62 |
| 不可能 | 3 | 3.19 |
| 生産力 | 3 | 5.00 |
| ライセンス | 3 | 4.99 |
| 証明 | 3 | 3.41 |
| 冷や汗 | 3 | 3.78 |
| 開業 | 3 | 5.06 |
| 社長室 | 3 | 5.23 |
| 耐火 | 3 | 5.09 |
| 遅い | 3 | 3.19 |
| 納品 | 3 | 4.27 |
| 分かり | 3 | 3.36 |
| 無責任 | 3 | 4.30 |
| 生きる | 3 | 3.23 |
| 何度でも | 3 | 4.25 |
| 速く | 3 | 3.79 |
| にしても | 3 | 3.12 |
| 計算 | 3 | 3.48 |
| 察知 | 3 | 3.27 |
| 保管 | 3 | 3.85 |
| 縁 | 3 | 3.49 |
| 釘 | 3 | 3.92 |
| がたい | 3 | 3.92 |
| 移る | 3 | 3.53 |
| 巨体 | 3 | 3.50 |
| 行動 | 3 | 2.64 |
| 業者 | 3 | 4.25 |
| 交渉 | 3 | 3.24 |
| 刺し | 3 | 3.79 |
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