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 |
|---|---|---|
| あちこち | 5 | 3.50 |
| 遙かに | 5 | 3.80 |
| 飯 | 5 | 3.57 |
| 崩す | 5 | 3.45 |
| へー | 5 | 3.80 |
| 資材 | 5 | 4.06 |
| 呆れる | 5 | 3.09 |
| もつ | 5 | 3.52 |
| 休む | 5 | 3.22 |
| ふと | 5 | 3.07 |
| のろのろ | 5 | 4.51 |
| 研究所 | 5 | 3.80 |
| トレード | 5 | 4.97 |
| 頼り | 5 | 3.53 |
| 念のため | 5 | 3.66 |
| 奥 | 5 | 2.86 |
| 件 | 5 | 2.96 |
| 無償 | 5 | 4.41 |
| ボディ | 5 | 4.25 |
| 処理 | 5 | 3.41 |
| 教習所 | 5 | 5.69 |
| 安価 | 5 | 4.28 |
| 巻き込む | 5 | 3.17 |
| 圧倒的 | 5 | 3.25 |
| 再度 | 5 | 3.43 |
| 役に立つ | 5 | 3.45 |
| エンジニア | 5 | 5.18 |
| 直前 | 5 | 3.52 |
| 移転 | 5 | 4.69 |
| GPS | 5 | 5.30 |
| 落ち | 5 | 3.01 |
| コントロール | 5 | 3.85 |
| 落とし | 5 | 3.24 |
| 合わせ | 5 | 3.63 |
| さっと | 5 | 3.85 |
| 世論 | 5 | 4.88 |
| 遺体 | 5 | 3.87 |
| 回 | 5 | 3.36 |
| 唱える | 5 | 3.44 |
| 稼業 | 5 | 4.52 |
| 国旗 | 5 | 4.87 |
| 電気 | 5 | 4.05 |
| 三日 | 5 | 3.50 |
| 活躍 | 5 | 3.42 |
| ローテーション | 5 | 4.73 |
| 器 | 5 | 3.42 |
| 一年 | 5 | 3.42 |
| 技術者 | 5 | 4.11 |
| 押し寄せる | 5 | 3.80 |
| 居間 | 5 | 4.07 |
| 一方 | 5 | 3.21 |
| 変 | 5 | 2.97 |
| 罠 | 5 | 3.13 |
| はは | 5 | 3.43 |
| 淡々 | 5 | 3.61 |
| フロリダ | 5 | 6.27 |
| 青い | 5 | 3.17 |
| ようこそ | 5 | 3.86 |
| 外に | 5 | 2.98 |
| 納める | 5 | 4.22 |
| 一人一人 | 5 | 4.21 |
| 検疫官 | 5 | 6.75 |
| 真っ直ぐ | 5 | 3.17 |
| 各自 | 5 | 4.02 |
| 念じる | 5 | 4.11 |
| はん | 5 | 4.28 |
| 車体 | 5 | 4.49 |
| 判定 | 5 | 3.99 |
| 穏やか | 5 | 3.23 |
| 間合い | 5 | 3.58 |
| 方式 | 5 | 4.22 |
| 楽 | 5 | 3.16 |
| 近頃 | 5 | 4.41 |
| 戦車 | 5 | 3.87 |
| B | 5 | 3.69 |
| 迫る | 5 | 3.06 |
| 抜ける | 5 | 3.26 |
| 切れない | 5 | 3.53 |
| 物なら | 5 | 3.68 |
| 開催 | 5 | 3.90 |
| 加える | 5 | 3.36 |
| 帯同 | 5 | 5.10 |
| 騒音 | 5 | 4.58 |
| 地道 | 5 | 4.22 |
| レクチャー | 5 | 4.72 |
| 時折 | 5 | 3.49 |
| 聞かす | 5 | 3.61 |
| 構え | 5 | 3.16 |
| 煎 | 5 | 4.07 |
| 同席 | 5 | 4.03 |
| 七 | 5 | 3.10 |
| 監視 | 5 | 3.31 |
| 出かける | 5 | 3.56 |
| 現在のところ | 5 | 4.97 |
| 正面 | 5 | 3.68 |
| 一方的 | 5 | 3.57 |
| 手伝う | 5 | 3.17 |
| 一振り | 5 | 4.00 |
| 発行 | 5 | 4.15 |
| 耳打ち | 5 | 4.09 |
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