★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 |
|---|---|---|
| 祀る | 3 | 4.40 |
| 速さ | 3 | 3.57 |
| 戻ってくる | 3 | 3.52 |
| 振るう | 3 | 3.18 |
| 気づかれ | 3 | 4.55 |
| 拭う | 3 | 3.60 |
| 予想外 | 3 | 3.46 |
| 突き出す | 3 | 3.65 |
| 治安 | 3 | 3.89 |
| 収束 | 3 | 3.93 |
| 受け取る | 3 | 3.03 |
| 嫌い | 3 | 3.22 |
| 隠れる | 3 | 3.64 |
| 純粋 | 3 | 3.41 |
| 裂ける | 3 | 4.11 |
| 現れ | 3 | 3.42 |
| くくっ | 3 | 4.21 |
| 身長 | 3 | 3.45 |
| 常に | 3 | 3.18 |
| 深い | 3 | 3.16 |
| 古い | 3 | 3.58 |
| 見据える | 3 | 3.53 |
| み | 3 | 2.97 |
| やら | 3 | 2.96 |
| 花 | 3 | 2.84 |
| 勇敢 | 3 | 4.28 |
| 悲しみ | 3 | 3.79 |
| せずに | 3 | 3.22 |
| 並ぶ | 3 | 3.38 |
| 似合う | 3 | 3.33 |
| らしい | 3 | 2.54 |
| 実 | 3 | 3.37 |
| げ | 3 | 3.36 |
| てな | 3 | 3.27 |
| 打ち首 | 3 | 5.22 |
| 絶つ | 3 | 4.16 |
| 流し | 3 | 3.30 |
| 選ぶ | 3 | 2.84 |
| 愉悦 | 3 | 4.50 |
| 覚める | 3 | 3.73 |
| 刺さる | 3 | 3.65 |
| 木々 | 3 | 3.48 |
| なれば | 3 | 2.99 |
| 下手 | 3 | 3.26 |
| お互い | 3 | 3.30 |
| 唯一 | 3 | 3.27 |
| 首が飛ぶ | 3 | 5.05 |
| 一敗 | 3 | 3.30 |
| 宜しい | 3 | 3.44 |
| 基調 | 3 | 4.28 |
| 後悔 | 3 | 3.30 |
| 流れ | 3 | 2.90 |
| 着く | 3 | 3.05 |
| 寅 | 3 | 3.74 |
| 些細 | 3 | 3.89 |
| 吠える | 3 | 3.84 |
| 軍隊 | 3 | 3.83 |
| 歩 | 3 | 3.66 |
| 醜い | 3 | 3.92 |
| 元々 | 3 | 2.91 |
| 凍りつく | 3 | 4.02 |
| 冷静 | 3 | 3.16 |
| 泣き | 3 | 3.33 |
| もう一つ | 3 | 3.36 |
| 規模 | 3 | 3.33 |
| 始点 | 3 | 3.69 |
| 効果 | 3 | 2.77 |
| 放る | 3 | 3.59 |
| 趣味 | 3 | 3.37 |
| 悩み | 3 | 3.65 |
| 滲む | 3 | 3.60 |
| 乗り込む | 3 | 3.56 |
| 瓦解 | 3 | 4.38 |
| 入れる | 3 | 2.73 |
| 混じる | 3 | 3.46 |
| 違和感 | 3 | 3.28 |
| 水たまり | 3 | 4.72 |
| それにしても | 3 | 3.12 |
| 長年 | 3 | 3.70 |
| 左腕 | 3 | 3.56 |
| 悲しげ | 3 | 4.23 |
| ところを | 3 | 3.26 |
| 遭遇 | 3 | 3.37 |
| 思い浮かべる | 3 | 3.73 |
| 固まる | 3 | 3.33 |
| 乃公 | 3 | 3.15 |
| 兄上 | 3 | 3.54 |
| 詰め | 3 | 3.50 |
| 仲良し | 3 | 4.19 |
| 薄っすら | 3 | 3.79 |
| 獅子 | 3 | 3.41 |
| 苦労 | 3 | 3.22 |
| 普段 | 3 | 2.97 |
| 弱々しい | 3 | 4.04 |
| 不味い | 3 | 3.21 |
| 膨らむ | 3 | 3.63 |
| 武士 | 3 | 4.03 |
| 中心 | 3 | 3.08 |
| 微笑む | 3 | 3.01 |
| もっと | 3 | 2.63 |
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