★Novelized by Overlap Bunko. Series cumulative sales exceed 1 million copies. All 13 volumes now on sale. Once, the boy was called the "God of War." He saved a fallen nation in the otherworld called Alethia, and through conquering surrounding countries, he built a great empire. However, the boy made the resolve to abandon everything and returned to the modern era at the cost of losing his memory. Three years have passed, and the boy was living his days happily. But then he is summoned back to the otherworld once more. However, it was Alethia 1,000 years in the future. His past glory has become "myth," and the "legend" of the boy called the "Dual Black Hero King" begins to unfold.
| Word | Frequency | Difficulty |
|---|---|---|
| 南方 | 2 | 3.95 |
| 荷駄 | 2 | 4.06 |
| 二級 | 2 | 4.69 |
| 階建て | 2 | 4.57 |
| 陣取り | 2 | 4.75 |
| 咎める | 2 | 4.06 |
| 以下 | 2 | 3.49 |
| 騒ぐ | 2 | 3.50 |
| 今のところ | 2 | 3.44 |
| ビックリ | 2 | 4.14 |
| 和らぐ | 2 | 4.32 |
| 築き上げる | 2 | 4.42 |
| 螺旋状 | 2 | 4.92 |
| 何と | 2 | 3.05 |
| 怒濤の勢い | 2 | 5.86 |
| 凍える | 2 | 4.42 |
| 気迫 | 2 | 4.19 |
| 唐突 | 2 | 3.52 |
| 目指す | 2 | 3.30 |
| 援護射撃 | 2 | 4.64 |
| 売り飛ばす | 2 | 4.78 |
| 癒やし | 2 | 4.58 |
| 歩み | 2 | 3.70 |
| 何かしら | 2 | 3.50 |
| 参る | 2 | 3.61 |
| 冷める | 2 | 3.72 |
| 覚ます | 2 | 3.63 |
| 圧力 | 2 | 3.76 |
| 領土 | 2 | 3.72 |
| 鳴り響く | 2 | 3.83 |
| 無骨 | 2 | 4.30 |
| そうだね | 2 | 3.30 |
| 頂きます | 2 | 3.32 |
| 覇を唱える | 2 | 5.55 |
| ないと | 2 | 3.06 |
| 骸 | 2 | 4.23 |
| 圧倒 | 2 | 3.78 |
| 植う | 2 | 3.65 |
| 子 | 2 | 2.51 |
| 呈す | 2 | 4.24 |
| 越え | 2 | 3.58 |
| 生える | 2 | 3.27 |
| 焦点 | 2 | 4.27 |
| かも知れません | 2 | 3.08 |
| ぴったり | 2 | 3.91 |
| 申す | 2 | 3.40 |
| 見られる | 2 | 3.60 |
| 高塀 | 2 | 7.11 |
| 直す | 2 | 3.51 |
| 讃える | 2 | 4.34 |
| 迸る | 2 | 4.15 |
| 憑かれる | 2 | 4.47 |
| 断る | 2 | 3.15 |
| 思念 | 2 | 3.96 |
| そういうもん | 2 | 4.57 |
| 蛇行 | 2 | 4.81 |
| 堅牢 | 2 | 4.25 |
| 寿命 | 2 | 3.81 |
| 柱 | 2 | 3.40 |
| 息吹 | 2 | 4.35 |
| 愛想笑い | 2 | 4.49 |
| 長髪 | 2 | 4.27 |
| 馬首 | 2 | 4.95 |
| 縦横無尽 | 2 | 4.31 |
| 若しかしたら | 2 | 3.16 |
| 高さ | 2 | 3.36 |
| 日頃 | 2 | 4.08 |
| 万歳 | 2 | 4.32 |
| 別人 | 1 | 4.00 |
| 狡猾 | 1 | 4.44 |
| 不自然 | 1 | 3.62 |
| 羽虫 | 1 | 4.51 |
| 泊 | 1 | 4.58 |
| 賑わう | 1 | 4.22 |
| 信頼 | 1 | 3.23 |
| 大型 | 1 | 3.45 |
| 同様に | 1 | 3.46 |
| 季節 | 1 | 3.72 |
| 物言う | 1 | 4.62 |
| 名もなき | 1 | 4.71 |
| 奏す | 1 | 4.40 |
| 夕陽 | 1 | 4.45 |
| 脅威 | 1 | 3.41 |
| 目を閉じる | 1 | 4.22 |
| アレ | 1 | 3.12 |
| 掛け布団 | 1 | 5.04 |
| 広がり | 1 | 3.86 |
| 正解 | 1 | 3.47 |
| 長らく | 1 | 4.28 |
| 山賊 | 1 | 3.89 |
| 興味本位 | 1 | 4.58 |
| 降る | 1 | 3.80 |
| うねる | 1 | 4.56 |
| 偉業 | 1 | 4.36 |
| 同期 | 1 | 4.22 |
| 飛び | 1 | 3.52 |
| 登山 | 1 | 4.75 |
| 助けて | 1 | 3.13 |
| 終着点 | 1 | 4.86 |
| 約 | 1 | 3.47 |
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