In a future Japan divided into several small nations after the collapse of civilization, this is a rise-to-power harem story depicting battles and adventures woven between the protagonist who has obtained the strongest level of power and several girls. The protagonist, who has time-slipped into a post-civilization-collapse future where special powers have become commonplace, takes up work as an "excavator," uncovering modern machine parts, products, metals and other items said to be relics from the mythological age based on memories and knowledge from that era. Furthermore, the protagonist encounters a beautiful girl in that land. This girl is the grown-up version of the neighbor's only daughter who was caught up in the time transfer before it happened—a young girl who adored him saying "I love you, big brother." That neighbor has become a Grand Duke ruling that land. ※Book version Volume 1 released on December 25, 2015. Book version Volume 2 released on February 25, 2016. Book version Volume 3 released on November 10, 2016.
| Word | Frequency | Difficulty |
|---|---|---|
| 数日 | 7 | 3.33 |
| 体つき | 7 | 4.32 |
| 羽 | 7 | 3.24 |
| 気配 | 7 | 2.79 |
| 危ない | 7 | 3.21 |
| そんなもの | 7 | 3.41 |
| 育つ | 7 | 3.40 |
| 大気 | 7 | 3.87 |
| 吹き飛ぶ | 7 | 3.58 |
| 数名 | 7 | 3.87 |
| 質 | 7 | 3.62 |
| 取り除く | 7 | 4.04 |
| キラキラ | 7 | 3.63 |
| 隠す | 7 | 3.08 |
| 恋人 | 7 | 3.51 |
| 次第に | 7 | 3.63 |
| 試す | 7 | 3.51 |
| なあ | 7 | 2.86 |
| 後ろ足 | 7 | 4.47 |
| 持ち合わせ | 7 | 3.93 |
| その様 | 7 | 2.83 |
| 車体 | 7 | 4.49 |
| 傷つける | 7 | 3.50 |
| 弱い | 7 | 3.11 |
| シャツ | 7 | 3.89 |
| ま | 7 | 2.85 |
| 整備 | 7 | 3.62 |
| 急に | 7 | 3.14 |
| 訳ない | 7 | 3.74 |
| 真面目 | 7 | 3.25 |
| と言うと | 7 | 3.52 |
| ポイント | 7 | 3.09 |
| 天変地異 | 7 | 4.66 |
| 途端に | 7 | 3.56 |
| 掘り進む | 7 | 4.97 |
| 除け | 7 | 3.88 |
| 強引 | 7 | 3.42 |
| ゆったり | 7 | 3.87 |
| 箱 | 7 | 3.37 |
| 熱 | 7 | 3.20 |
| 進路 | 7 | 3.84 |
| 困った | 7 | 3.27 |
| 北門 | 7 | 4.33 |
| 近づき | 7 | 3.85 |
| 波高 | 7 | 3.69 |
| 余る | 7 | 3.72 |
| 軽 | 7 | 3.90 |
| 何倍も | 7 | 4.32 |
| 遊ぶ | 7 | 3.13 |
| マズい | 7 | 4.31 |
| 出かける | 7 | 3.56 |
| タイプ | 7 | 3.22 |
| 兄 | 7 | 2.88 |
| 偉そう | 7 | 3.84 |
| 十二 | 7 | 3.73 |
| 昼 | 7 | 3.52 |
| 造り | 7 | 3.84 |
| 付き | 7 | 3.15 |
| 顔面 | 7 | 3.59 |
| にも拘らず | 7 | 3.72 |
| そうもない | 7 | 4.27 |
| そうすれば | 7 | 3.65 |
| 知れる | 7 | 3.41 |
| 十四 | 7 | 4.09 |
| 絶望 | 7 | 3.38 |
| 次々 | 7 | 3.28 |
| 祖父 | 7 | 3.41 |
| 慕う | 7 | 3.73 |
| 鎧 | 7 | 2.87 |
| ひたすら | 7 | 3.47 |
| 勝利 | 7 | 2.88 |
| そうだね | 7 | 3.30 |
| 域 | 7 | 3.85 |
| 和服 | 7 | 4.72 |
| 美人 | 7 | 3.43 |
| 裏切る | 7 | 3.46 |
| 向い | 7 | 3.44 |
| 秋 | 7 | 3.57 |
| 閉じ込める | 7 | 3.69 |
| 一回 | 7 | 3.50 |
| そっち | 7 | 3.10 |
| 数える | 7 | 3.87 |
| 救助 | 7 | 4.14 |
| 叩き | 7 | 3.26 |
| 見かねる | 7 | 4.32 |
| 究極 | 7 | 4.13 |
| 晒す | 7 | 3.59 |
| その通り | 7 | 3.27 |
| 人員 | 7 | 3.65 |
| ゴツゴツ | 7 | 4.70 |
| 書き込む | 7 | 4.05 |
| まとめる | 7 | 3.82 |
| 跳躍 | 7 | 3.45 |
| 揺れ | 7 | 3.49 |
| 寝る | 7 | 3.20 |
| 刺す | 7 | 3.50 |
| 切れない | 7 | 3.53 |
| 設置 | 7 | 3.34 |
| 古い | 7 | 3.58 |
| 追い払う | 7 | 4.05 |
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