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 |
|---|---|---|
| 苟も | 1 | 6.11 |
| カタログスペック | 1 | 5.87 |
| 原稿 | 1 | 4.51 |
| カテゴリ | 1 | 4.88 |
| 包み込む | 1 | 3.70 |
| 幼なじみ | 1 | 4.25 |
| 続行 | 1 | 4.25 |
| 若々しい | 1 | 4.56 |
| カンナ | 1 | 3.99 |
| 優男 | 1 | 4.47 |
| 休憩所 | 1 | 4.53 |
| 永久 | 1 | 4.27 |
| 中佐 | 1 | 4.51 |
| 討ち漏らす | 1 | 6.13 |
| 富む | 1 | 4.22 |
| 路 | 1 | 3.84 |
| 空飛ぶ | 1 | 4.26 |
| 降ろし | 1 | 4.13 |
| 麻痺 | 1 | 3.54 |
| 野心家 | 1 | 4.94 |
| フレーム | 1 | 4.23 |
| 厳格 | 1 | 4.41 |
| 和解 | 1 | 4.24 |
| 知識人 | 1 | 5.35 |
| 突き刺す | 1 | 3.70 |
| 吹っ | 1 | 3.29 |
| 複合 | 1 | 4.21 |
| 動じる | 1 | 4.07 |
| 国際規格 | 1 | 6.75 |
| 運転資金 | 1 | 6.01 |
| 取り壊し | 1 | 5.40 |
| 回りくどい | 1 | 4.52 |
| 武器弾薬 | 1 | 5.52 |
| 二度と | 1 | 3.48 |
| 金山 | 1 | 5.05 |
| 食いつぶす | 1 | 5.36 |
| ばっさり | 1 | 4.65 |
| 一着 | 1 | 4.68 |
| 並 | 1 | 3.70 |
| 返信 | 1 | 4.19 |
| 暁 | 1 | 3.74 |
| ノブ | 1 | 4.51 |
| 多 | 1 | 3.46 |
| 遠方 | 1 | 4.06 |
| それでもって | 1 | 5.22 |
| おいおい | 1 | 3.46 |
| 後ろ手 | 1 | 4.44 |
| うかうか | 1 | 4.88 |
| ような気がする | 1 | 3.55 |
| 点灯 | 1 | 4.92 |
| 二級 | 1 | 4.69 |
| 所得 | 1 | 5.44 |
| 気をつけて | 1 | 3.82 |
| 別名 | 1 | 4.48 |
| 正しく | 1 | 3.40 |
| 表向き | 1 | 3.98 |
| そしたら | 1 | 3.83 |
| 鈍色 | 1 | 4.70 |
| 遊軍 | 1 | 5.72 |
| 得意気 | 1 | 4.67 |
| 含み笑い | 1 | 4.71 |
| マイクロ | 1 | 5.15 |
| 座り | 1 | 3.58 |
| 社会福祉法人 | 1 | 7.11 |
| ビン | 1 | 4.28 |
| 理屈 | 1 | 3.71 |
| 〆 | 1 | 4.51 |
| ゲストハウス | 1 | 5.81 |
| 公告 | 1 | 6.34 |
| Yシャツ | 1 | 4.95 |
| 歩き始める | 1 | 4.53 |
| 二つ目 | 1 | 4.11 |
| 粘り強い | 1 | 4.98 |
| 気が楽 | 1 | 4.48 |
| 樹 | 1 | 3.28 |
| ブラジャー | 1 | 5.03 |
| 丸腰 | 1 | 4.80 |
| 陣形 | 1 | 3.94 |
| 危険度 | 1 | 4.20 |
| 計画通り | 1 | 4.57 |
| 間延びした | 1 | 4.64 |
| 署名捺印 | 1 | 6.30 |
| 取り巻く | 1 | 4.25 |
| 由緒正しい | 1 | 4.98 |
| 圧殺 | 1 | 4.82 |
| 打ち止め | 1 | 4.91 |
| 署名 | 1 | 4.36 |
| 崩し | 1 | 3.70 |
| 自意識 | 1 | 4.93 |
| 還元 | 1 | 4.51 |
| 直面 | 1 | 4.43 |
| 本堂 | 1 | 5.13 |
| 区画 | 1 | 3.72 |
| 僅かながら | 1 | 4.45 |
| 特集記事 | 1 | 6.48 |
| 重さ | 1 | 3.66 |
| 却って | 1 | 3.83 |
| 無心 | 1 | 4.52 |
| 顔つき | 1 | 3.83 |
| 真っ盛り | 1 | 4.82 |
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