※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 |
|---|---|---|
| 持久戦 | 10 | 4.80 |
| 音がする | 10 | 4.14 |
| 引き返す | 10 | 4.17 |
| 相克 | 10 | 5.36 |
| 仕上げる | 10 | 4.25 |
| ほうが良い | 10 | 3.44 |
| 膨張 | 10 | 4.34 |
| あからさま | 10 | 3.81 |
| 同格 | 10 | 4.36 |
| 軽口 | 10 | 4.05 |
| 独自 | 10 | 3.80 |
| 化ける | 10 | 4.46 |
| 併走 | 10 | 4.93 |
| 相手側 | 10 | 4.56 |
| 昆虫 | 10 | 4.24 |
| 侵す | 10 | 4.24 |
| 差し込む | 10 | 3.84 |
| 絡める | 10 | 4.00 |
| たん | 10 | 3.48 |
| お伺い | 10 | 4.36 |
| 体積 | 10 | 4.58 |
| 跳ね上げ | 10 | 4.62 |
| 言わんばかり | 10 | 3.50 |
| 新鮮 | 10 | 3.78 |
| 欠損 | 10 | 4.32 |
| 焦燥感 | 10 | 4.51 |
| 飛蝗 | 10 | 4.80 |
| 逃れ | 10 | 3.96 |
| まい | 10 | 3.58 |
| 元へ | 10 | 3.46 |
| 有用 | 10 | 4.11 |
| 異質 | 10 | 4.11 |
| 労役 | 10 | 5.16 |
| 平行 | 10 | 4.40 |
| 吹き | 10 | 4.04 |
| 防衛費 | 10 | 5.92 |
| 先見性 | 10 | 5.79 |
| のぞき穴 | 10 | 5.93 |
| 着る | 10 | 3.35 |
| 怪我人 | 10 | 3.96 |
| 全力疾走 | 10 | 4.43 |
| 推薦 | 10 | 4.13 |
| 狭まる | 10 | 4.63 |
| 小細工 | 10 | 4.38 |
| 大地 | 10 | 3.20 |
| 関わり | 10 | 3.90 |
| 包丁 | 10 | 3.90 |
| 脱ぐ | 10 | 3.49 |
| 挟み | 10 | 4.30 |
| か年 | 10 | 4.53 |
| 静止 | 10 | 4.20 |
| 響き渡る | 10 | 3.85 |
| 足音 | 10 | 3.51 |
| 爆散 | 10 | 4.46 |
| 悩み | 10 | 3.65 |
| 再確認 | 10 | 4.26 |
| 助力 | 10 | 4.01 |
| 怯む | 10 | 3.84 |
| ガラス | 10 | 3.67 |
| 身に付ける | 10 | 4.74 |
| 首を突っ込む | 10 | 4.79 |
| 隔離 | 10 | 4.14 |
| 損得勘定 | 10 | 5.14 |
| 蓄積 | 10 | 4.04 |
| 突き刺す | 10 | 3.70 |
| ため息 | 10 | 3.17 |
| 無差別 | 10 | 4.48 |
| 体験 | 10 | 3.69 |
| 憂き目 | 10 | 5.00 |
| 共同 | 10 | 4.24 |
| 暮らし | 10 | 3.33 |
| ずるい | 10 | 3.94 |
| 分断 | 10 | 4.10 |
| 字 | 10 | 3.69 |
| 透明 | 10 | 3.71 |
| 冷やす | 10 | 4.17 |
| 換金 | 10 | 4.15 |
| 激怒 | 10 | 4.16 |
| 間違える | 10 | 3.64 |
| 着物 | 10 | 3.99 |
| 暴動 | 10 | 4.48 |
| 言い合い | 10 | 4.35 |
| 半 | 10 | 3.51 |
| 決済 | 10 | 4.92 |
| 定か | 10 | 4.17 |
| 散歩 | 10 | 3.81 |
| 弱さ | 10 | 4.17 |
| 意思疎通 | 10 | 4.23 |
| 目掛け | 10 | 3.86 |
| 得物 | 10 | 3.79 |
| 理想 | 10 | 3.63 |
| 主催者 | 10 | 4.54 |
| 軍 | 10 | 2.60 |
| 大抵 | 10 | 3.58 |
| だけしか | 10 | 4.22 |
| 塗工 | 10 | 4.13 |
| 波 | 10 | 3.25 |
| 優れて | 10 | 3.90 |
| 左足 | 10 | 4.19 |
| 上等 | 10 | 3.92 |
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