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 |
|---|---|---|
| 道案内 | 1 | 4.46 |
| 手出し | 1 | 4.06 |
| ナーバス | 1 | 5.55 |
| 偵察機 | 1 | 5.33 |
| 下らない | 1 | 3.81 |
| 雑誌 | 1 | 4.28 |
| ハイビーム | 1 | 6.64 |
| 上着 | 1 | 3.94 |
| ミラー | 1 | 4.24 |
| 手当 | 1 | 4.28 |
| 人任せ | 1 | 5.11 |
| 防火 | 1 | 5.48 |
| 三代 | 1 | 5.14 |
| 在籍 | 1 | 4.54 |
| 試行錯誤 | 1 | 4.22 |
| 捕らわれ | 1 | 4.67 |
| 数種類 | 1 | 4.71 |
| 伝導性 | 1 | 5.93 |
| きょろきょろ | 1 | 4.26 |
| 荒野 | 1 | 3.88 |
| ずばり | 1 | 4.81 |
| 深 | 1 | 3.89 |
| 足早に | 1 | 4.08 |
| 停める | 1 | 4.18 |
| 奮闘 | 1 | 4.25 |
| 一年中 | 1 | 5.13 |
| ユニ | 1 | 4.22 |
| 小っちゃな | 1 | 5.03 |
| おま | 1 | 4.55 |
| 数日間 | 1 | 4.38 |
| 渋み | 1 | 4.99 |
| ネ申 | 1 | 4.59 |
| 疑いの目 | 1 | 4.94 |
| 排水溝 | 1 | 5.38 |
| 策定 | 1 | 5.20 |
| 日にち | 1 | 4.87 |
| リストアップ | 1 | 5.08 |
| 一片 | 1 | 4.49 |
| 食いしばる | 1 | 4.17 |
| 後追い | 1 | 5.28 |
| 崩れ落ちる | 1 | 3.64 |
| 打撃 | 1 | 3.58 |
| 魅力 | 1 | 3.70 |
| 訳ではない | 1 | 3.38 |
| 振り絞る | 1 | 4.02 |
| ラッパ飲み | 1 | 5.55 |
| 大黒柱 | 1 | 5.25 |
| うふふ | 1 | 3.92 |
| 記者会見 | 1 | 5.20 |
| 製造元 | 1 | 5.76 |
| 射貫く | 1 | 4.90 |
| 成型 | 1 | 5.31 |
| 読み込む | 1 | 4.78 |
| 画像 | 1 | 3.99 |
| 長柄 | 1 | 4.67 |
| ネガティブ | 1 | 4.60 |
| ストレス解消 | 1 | 5.14 |
| アンペア | 1 | 6.05 |
| 挺 | 1 | 4.50 |
| 黒い霧 | 1 | 4.58 |
| 実物 | 1 | 4.28 |
| 講習会 | 1 | 5.42 |
| そばかす | 1 | 4.66 |
| 揃える | 1 | 3.93 |
| 一般化 | 1 | 5.40 |
| 扁桃 | 1 | 6.89 |
| 今日のところは | 1 | 4.38 |
| 候補者 | 1 | 4.41 |
| やってられない | 1 | 4.88 |
| 切り返す | 1 | 4.82 |
| 涙目 | 1 | 3.75 |
| 推定 | 1 | 4.42 |
| 茜色 | 1 | 4.88 |
| 付属病院 | 1 | 6.40 |
| エアサス | 1 | 7.59 |
| 専門知識 | 1 | 5.23 |
| 行き止まり | 1 | 4.36 |
| プリーズ | 1 | 5.20 |
| 貸す | 1 | 3.91 |
| 引き入れる | 1 | 4.43 |
| 悲壮 | 1 | 4.58 |
| 仕立て | 1 | 4.05 |
| ショッピング | 1 | 5.02 |
| ラフティング | 1 | 6.66 |
| 泣かす | 1 | 4.60 |
| 跳ね上げ | 1 | 4.62 |
| ホームシック | 1 | 5.23 |
| 一文字 | 1 | 4.39 |
| 伊蘭 | 1 | 4.40 |
| 手繰り | 1 | 4.78 |
| 面持ち | 1 | 3.65 |
| 致死 | 1 | 4.59 |
| 妄動 | 1 | 4.36 |
| 縮小 | 1 | 4.43 |
| 額 | 1 | 3.17 |
| びくっと | 1 | 4.58 |
| 彼個人 | 1 | 5.47 |
| 叩き潰す | 1 | 4.44 |
| 障り | 1 | 5.32 |
| それどころか | 1 | 3.58 |
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