※This work has been novelized by Mag Garden※ Mikanaagi Rio is an ordinary 13-year-old boy who describes himself as average and unremarkable. To participate in his usual repetitive daily life, he steps out through his home's front door, but instead of the familiar gate, he finds himself in an endlessly white world. And waiting there is an arrogant ball of light that claims to be a god. The god's request is simple: "Please save this world that has reached a dead end." Rio is bewildered by this plea, which seems to have been directed at the wrong person. However, upon hearing the words "magic and monsters exist," he nods in agreement and heads toward his destination—the harsh otherworld of Sphere, where death flags flutter ominously at every turn. Yet the god who made this plea for salvation grants him no special powers whatsoever. He is given no information about the problems he must solve, with his only information being the unhelpful fact that he is "the weakest 13-year-old in the world." Bound by countless restrictions and constraints, a story of trial and error for survival begins.
| Word | Frequency | Difficulty |
|---|---|---|
| 炊く | 4 | 4.42 |
| 将棋 | 4 | 4.64 |
| 青褪める | 4 | 5.44 |
| ほら見ろ | 4 | 5.02 |
| 賢 | 4 | 3.97 |
| 計画通り | 4 | 4.57 |
| 税率 | 4 | 4.94 |
| 脇腹 | 4 | 3.94 |
| 眠そう | 4 | 4.27 |
| 昼食会 | 4 | 4.95 |
| 問い返す | 4 | 4.31 |
| 狂わす | 4 | 4.87 |
| 仲良い | 4 | 4.43 |
| 薄情 | 4 | 4.54 |
| 水流 | 4 | 4.08 |
| ライオン | 4 | 4.19 |
| 下策 | 4 | 4.95 |
| 予て | 4 | 4.16 |
| 移り変わる | 4 | 4.82 |
| すっかり | 4 | 3.27 |
| 施行 | 4 | 5.10 |
| 誤射 | 4 | 5.00 |
| 過分 | 4 | 4.81 |
| 余すことなく | 4 | 4.91 |
| 書き換える | 4 | 4.69 |
| 動作確認 | 4 | 5.33 |
| 新機軸 | 4 | 5.64 |
| 細腕 | 4 | 4.75 |
| 進入 | 4 | 4.63 |
| 支出 | 4 | 4.96 |
| 安定した | 4 | 4.24 |
| 時折 | 4 | 3.49 |
| 戦争準備 | 4 | 5.59 |
| 我先に | 4 | 4.46 |
| 教諭 | 4 | 4.89 |
| 鋭利 | 4 | 4.30 |
| ノー | 4 | 3.90 |
| 攻守 | 4 | 4.91 |
| ぐぬぬ | 4 | 4.60 |
| 求む | 4 | 4.99 |
| 始まらない | 4 | 4.43 |
| 筆記試験 | 4 | 4.96 |
| 戦費 | 4 | 5.22 |
| 砕けた | 4 | 4.08 |
| 行方不明 | 4 | 3.96 |
| 建つ | 4 | 4.14 |
| 救われる | 4 | 4.40 |
| 技術料 | 4 | 5.60 |
| 何にもならない | 4 | 5.26 |
| ちょっとずつ | 4 | 4.74 |
| 行き詰る | 4 | 5.01 |
| 静まり返る | 4 | 3.98 |
| 暖かさ | 4 | 4.52 |
| 揺さぶり | 4 | 4.71 |
| 吊るす | 4 | 4.28 |
| お時間 | 4 | 4.19 |
| 商売敵 | 4 | 5.14 |
| 隔たる | 4 | 5.39 |
| 突 | 4 | 4.52 |
| 何にでも | 4 | 4.88 |
| 現行犯 | 4 | 5.16 |
| フレイル | 4 | 5.18 |
| 漲る | 4 | 4.30 |
| ついて来る | 4 | 4.06 |
| 気が付くと | 4 | 4.42 |
| 石化 | 4 | 3.75 |
| 厳密 | 4 | 4.29 |
| 早期 | 4 | 4.46 |
| 綴じる | 4 | 4.51 |
| 学力 | 4 | 4.74 |
| 人数分 | 4 | 4.40 |
| うずうず | 4 | 4.74 |
| 罰ゲーム | 4 | 4.52 |
| 取得者 | 4 | 5.66 |
| 追い立て | 4 | 4.68 |
| 他のもの | 4 | 4.70 |
| 玉ねぎ | 4 | 4.59 |
| 虚ろ | 4 | 4.12 |
| 引き篭もり | 4 | 5.29 |
| ボーっと | 4 | 4.63 |
| サバイバル | 4 | 4.53 |
| 負担を掛ける | 4 | 5.50 |
| 様子を伺う | 4 | 4.70 |
| 手厳しい | 4 | 4.74 |
| 全てにおいて | 4 | 4.71 |
| 餌付け | 4 | 4.76 |
| キラキラ | 4 | 3.63 |
| 踏み潰す | 4 | 5.00 |
| 一口大 | 4 | 5.08 |
| 重き | 4 | 4.70 |
| 小器用 | 4 | 5.51 |
| 限りなく | 4 | 4.09 |
| 酔狂 | 4 | 4.67 |
| 藪 | 4 | 4.56 |
| 貸し切る | 4 | 5.23 |
| 嫌気 | 4 | 4.62 |
| 鉄剣 | 4 | 5.04 |
| 美少女 | 4 | 3.50 |
| 沈下 | 4 | 5.35 |
| 漫画 | 4 | 3.68 |
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