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 |
|---|---|---|
| どころか | 4 | 3.21 |
| その場 | 4 | 2.86 |
| 両軍 | 4 | 4.46 |
| 感情 | 4 | 2.86 |
| 医学 | 4 | 4.61 |
| 1000万 | 4 | 5.11 |
| 専業 | 4 | 5.35 |
| 最上階 | 4 | 4.28 |
| 父 | 4 | 2.83 |
| 発 | 4 | 3.60 |
| 収録 | 4 | 4.94 |
| いい加減 | 4 | 3.56 |
| む | 4 | 3.40 |
| ブラックライト | 4 | 6.35 |
| 会場 | 4 | 3.33 |
| 再開 | 4 | 3.61 |
| 伸び | 4 | 3.37 |
| に対して | 4 | 2.68 |
| こだわる | 4 | 4.12 |
| 輝き | 4 | 3.35 |
| 結団式 | 4 | 6.81 |
| 浴衣 | 4 | 4.38 |
| 潜り | 4 | 3.90 |
| 特徴 | 4 | 3.47 |
| 蔓 | 4 | 4.24 |
| 廃業 | 4 | 5.10 |
| 亡くなる | 4 | 3.30 |
| マス | 4 | 3.88 |
| 抱く | 4 | 2.83 |
| 無さそう | 4 | 3.37 |
| たまたま | 4 | 3.63 |
| 変わり | 4 | 3.44 |
| 空間 | 4 | 2.91 |
| 過ぎ | 4 | 3.12 |
| 若干 | 4 | 3.24 |
| 買い上げ | 4 | 5.14 |
| これまた | 4 | 3.87 |
| 止まる | 4 | 2.95 |
| 刺さる | 4 | 3.65 |
| 酒 | 4 | 2.96 |
| 義援金 | 4 | 6.13 |
| 数十 | 4 | 3.58 |
| プラン | 4 | 4.22 |
| 渡る | 4 | 3.38 |
| 探査 | 4 | 3.88 |
| 発見 | 4 | 3.22 |
| 歌う | 4 | 3.58 |
| 背負う | 4 | 3.31 |
| 総代 | 4 | 5.64 |
| 別荘 | 4 | 4.20 |
| ちょうど良い | 4 | 3.72 |
| 守秘義務 | 4 | 5.08 |
| と言うことは | 4 | 3.00 |
| 恐れ | 4 | 3.43 |
| 進行 | 4 | 3.82 |
| 燃料棒 | 4 | 6.64 |
| なんと言っても | 4 | 4.51 |
| わくわく | 4 | 4.27 |
| 怪しい | 4 | 3.32 |
| ふわふわ | 4 | 3.89 |
| 集中 | 4 | 3.10 |
| 寒さ | 4 | 3.89 |
| 迷う | 4 | 3.30 |
| 支払い | 4 | 4.02 |
| 五日 | 4 | 3.24 |
| 球 | 4 | 3.56 |
| スリル | 4 | 3.73 |
| 難燃性 | 4 | 6.36 |
| 屋外 | 4 | 4.41 |
| 半分 | 4 | 3.03 |
| コンベンション | 4 | 6.78 |
| いいよ | 4 | 3.37 |
| トイレ | 4 | 3.70 |
| 声を上げる | 4 | 3.56 |
| 用事 | 4 | 3.50 |
| 英雄 | 4 | 3.16 |
| 引く | 4 | 2.90 |
| 帰還 | 4 | 3.35 |
| 省庁 | 4 | 5.34 |
| 通い | 4 | 4.32 |
| 人柄 | 4 | 4.12 |
| 改造 | 4 | 3.77 |
| リムジン | 4 | 5.29 |
| 切りそろえる | 4 | 4.84 |
| 無論 | 4 | 3.28 |
| 高性能 | 4 | 4.25 |
| 曲がる | 4 | 3.96 |
| 金髪 | 4 | 3.45 |
| 古今 | 4 | 5.20 |
| 方針 | 4 | 3.57 |
| 如何に | 4 | 3.55 |
| 部隊 | 4 | 2.88 |
| 抜く | 4 | 3.09 |
| 忠 | 4 | 4.54 |
| 倒れる | 4 | 3.23 |
| 設定 | 4 | 3.32 |
| 発光 | 4 | 4.01 |
| 皆様 | 4 | 3.43 |
| 熟練 | 4 | 3.88 |
| 証明書 | 4 | 4.76 |
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