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 |
|---|---|---|
| へえ | 7 | 3.66 |
| テレポート | 7 | 4.26 |
| スキューバ | 7 | 6.66 |
| 比 | 7 | 3.96 |
| 視察 | 7 | 3.93 |
| 真下 | 7 | 3.15 |
| かどうか | 7 | 3.06 |
| 係 | 7 | 3.47 |
| デース | 7 | 5.15 |
| 含む | 7 | 3.20 |
| 可惜 | 7 | 3.37 |
| 移築 | 7 | 5.39 |
| 極力 | 7 | 4.04 |
| トレーニング | 7 | 4.24 |
| 部署 | 7 | 4.18 |
| 老人 | 7 | 3.32 |
| 差 | 7 | 3.06 |
| 尋ね | 7 | 3.43 |
| 買い取り | 7 | 4.30 |
| 当てる | 7 | 3.52 |
| 用途 | 7 | 4.03 |
| 駿河 | 7 | 3.31 |
| ビビる | 7 | 4.00 |
| カラー | 7 | 4.46 |
| 引っかかる | 7 | 3.71 |
| 順に | 7 | 4.01 |
| 投資 | 7 | 4.39 |
| 十分 | 7 | 2.75 |
| 決まって | 7 | 3.34 |
| 温泉 | 7 | 3.62 |
| 事業 | 7 | 4.04 |
| いいか | 7 | 3.15 |
| 次々 | 7 | 3.28 |
| 事がない | 7 | 3.27 |
| 値段 | 7 | 3.46 |
| ても良い | 7 | 2.90 |
| たし | 7 | 3.84 |
| 曲 | 7 | 3.30 |
| 翌朝 | 7 | 3.92 |
| クマ | 7 | 3.43 |
| 頼る | 7 | 3.38 |
| なんというか | 7 | 3.68 |
| 職員 | 7 | 3.41 |
| 目指し | 7 | 3.53 |
| 映画 | 7 | 3.89 |
| 指輪 | 7 | 3.35 |
| マスク | 7 | 4.16 |
| 除隊 | 7 | 5.33 |
| 見つかる | 7 | 3.09 |
| 行い | 7 | 3.43 |
| 二佐 | 7 | 2.98 |
| 乃至 | 7 | 3.29 |
| 通用 | 7 | 3.67 |
| 人材育成 | 7 | 5.30 |
| 屠る | 7 | 4.01 |
| 招待状 | 7 | 4.22 |
| 今では | 7 | 3.48 |
| 60 | 7 | 4.02 |
| 続く | 7 | 2.90 |
| 育つ | 7 | 3.40 |
| 無言 | 7 | 3.22 |
| 収まる | 7 | 3.44 |
| 悲鳴 | 7 | 3.14 |
| 史的 | 7 | 3.73 |
| 立場 | 7 | 2.93 |
| 予算 | 7 | 3.81 |
| ぽんと | 7 | 4.39 |
| 水 | 7 | 2.51 |
| この度 | 7 | 3.88 |
| 包む | 7 | 3.08 |
| 済ませる | 7 | 3.29 |
| 会長 | 7 | 3.46 |
| 司令 | 7 | 4.23 |
| 訪ねる | 7 | 3.68 |
| 兼 | 7 | 3.80 |
| もう一つ | 7 | 3.36 |
| 即座に | 7 | 3.25 |
| 現れ | 7 | 3.42 |
| 先行 | 7 | 3.80 |
| S | 7 | 3.91 |
| 肉体 | 7 | 3.14 |
| 走る | 7 | 2.77 |
| いけ | 7 | 3.59 |
| 修学旅行 | 7 | 4.46 |
| 講習 | 7 | 4.39 |
| そいつ | 7 | 3.28 |
| 若手 | 7 | 4.20 |
| 一斉に | 7 | 3.36 |
| 苦戦 | 7 | 3.74 |
| フルスイング | 7 | 4.97 |
| 毎日 | 7 | 3.21 |
| 供給 | 7 | 3.80 |
| 何度も | 7 | 2.93 |
| デザート | 7 | 4.00 |
| 訳す | 7 | 4.78 |
| そりゃ | 7 | 3.16 |
| 目処 | 7 | 4.45 |
| 思える | 7 | 2.63 |
| 三体 | 7 | 4.05 |
| 向こう | 7 | 2.90 |
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