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 |
|---|---|---|
| 無駄 | 5 | 3.03 |
| トレード | 5 | 4.97 |
| ふと | 5 | 3.07 |
| 未成年 | 5 | 4.38 |
| 様です | 5 | 2.87 |
| 合流 | 5 | 3.35 |
| 医大 | 5 | 6.03 |
| やろ | 5 | 4.10 |
| 赤 | 5 | 3.11 |
| GPS | 5 | 5.30 |
| 帰宅 | 5 | 3.93 |
| お話し | 5 | 3.87 |
| レクチャー | 5 | 4.72 |
| 排除 | 5 | 3.51 |
| 責任 | 5 | 3.30 |
| 協議 | 5 | 4.36 |
| 偉い | 5 | 3.69 |
| 危なげない | 5 | 4.55 |
| 嘴 | 5 | 2.99 |
| 奥さん | 5 | 3.72 |
| 念じる | 5 | 4.11 |
| 読み | 5 | 3.20 |
| 落ち | 5 | 3.01 |
| 毎に | 5 | 3.53 |
| 就いて | 5 | 3.02 |
| 少尉 | 5 | 4.44 |
| 雪 | 5 | 3.11 |
| 今一 | 5 | 3.88 |
| 検証 | 5 | 3.91 |
| 通し | 5 | 3.74 |
| 死にかける | 5 | 4.10 |
| 300 | 5 | 4.09 |
| 地点 | 5 | 3.68 |
| 一転 | 5 | 4.05 |
| 流れる | 5 | 3.28 |
| 就職 | 5 | 4.28 |
| 歴史 | 5 | 3.34 |
| 時代 | 5 | 3.09 |
| もう一度 | 5 | 3.13 |
| 死 | 5 | 3.03 |
| 頼り | 5 | 3.53 |
| 我が | 5 | 3.03 |
| 挙げて | 5 | 3.30 |
| 余命 | 5 | 5.00 |
| 頷き | 5 | 3.24 |
| 崩す | 5 | 3.45 |
| 一枚 | 5 | 3.36 |
| 料理 | 5 | 2.62 |
| 交代 | 5 | 3.77 |
| 阻害 | 5 | 3.91 |
| 壊れる | 5 | 3.33 |
| 一つずつ | 5 | 4.26 |
| 再開発 | 5 | 5.39 |
| 上手い | 5 | 3.50 |
| 奴 | 5 | 2.57 |
| 引き | 5 | 3.23 |
| 三日 | 5 | 3.50 |
| 目の当たり | 5 | 3.91 |
| 本音 | 5 | 3.60 |
| 切れない | 5 | 3.53 |
| ご免 | 5 | 3.00 |
| 真っ青 | 5 | 3.96 |
| 押し寄せる | 5 | 3.80 |
| コントロール | 5 | 3.85 |
| 同席 | 5 | 4.03 |
| オーダー | 5 | 4.64 |
| 役に立つ | 5 | 3.45 |
| 切れる | 5 | 3.26 |
| 銃弾 | 5 | 4.01 |
| 19 | 5 | 4.13 |
| 一時期 | 5 | 4.33 |
| 無償 | 5 | 4.41 |
| 任務 | 5 | 3.38 |
| 諦め | 5 | 3.28 |
| 角 | 5 | 3.15 |
| 徽章 | 5 | 4.90 |
| 折る | 5 | 3.64 |
| 申請 | 5 | 4.03 |
| 変 | 5 | 2.97 |
| 抱きつく | 5 | 3.59 |
| いつ | 5 | 3.24 |
| 奥 | 5 | 2.86 |
| 慣れる | 5 | 3.12 |
| 活躍 | 5 | 3.42 |
| ようこそ | 5 | 3.86 |
| へー | 5 | 3.80 |
| 救急車 | 5 | 4.82 |
| 偉い人 | 5 | 4.25 |
| 決定 | 5 | 3.43 |
| 丸棒 | 5 | 5.96 |
| 検疫官 | 5 | 6.75 |
| ヶ月 | 5 | 3.60 |
| 仕方がない | 5 | 3.28 |
| お断り | 5 | 3.92 |
| おしまい | 5 | 4.09 |
| 年齢 | 5 | 3.21 |
| 庫内 | 5 | 3.22 |
| 引き合い | 5 | 4.85 |
| 淡々 | 5 | 3.61 |
| 手伝う | 5 | 3.17 |
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