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 |
|---|---|---|
| 髪の毛 | 4 | 3.78 |
| 奮闘 | 4 | 4.25 |
| 十月 | 4 | 4.65 |
| 言い難い | 4 | 4.09 |
| 踏む | 4 | 3.32 |
| 慥か | 4 | 3.82 |
| 役回り | 4 | 4.71 |
| 集まり | 4 | 3.63 |
| そうする | 4 | 3.75 |
| 案の定 | 4 | 3.83 |
| 蟹 | 4 | 3.81 |
| 他国 | 4 | 3.41 |
| 有り難うございました | 4 | 3.41 |
| 毎に | 4 | 3.53 |
| 微笑む | 4 | 3.01 |
| パソコン | 4 | 4.05 |
| 屈強 | 4 | 4.12 |
| 一路 | 4 | 4.72 |
| 大好物 | 4 | 4.58 |
| 茶色 | 4 | 3.87 |
| キツイ | 4 | 4.21 |
| 繋がる | 4 | 3.22 |
| どちら | 4 | 3.37 |
| 底力 | 4 | 5.14 |
| 叫び声 | 4 | 3.71 |
| 地盤 | 4 | 4.58 |
| 一目散に | 4 | 4.38 |
| 相まって | 4 | 4.02 |
| もち | 4 | 4.33 |
| クレーター | 4 | 4.29 |
| 会社 | 4 | 3.72 |
| すれ違う | 4 | 3.95 |
| 不利 | 4 | 3.45 |
| 事情 | 4 | 3.01 |
| 秘 | 4 | 4.46 |
| 低 | 4 | 3.89 |
| 姉 | 4 | 2.91 |
| ギャンブル | 4 | 4.62 |
| 優に | 4 | 4.11 |
| チート | 4 | 3.76 |
| 無事に | 4 | 3.37 |
| 色んな | 4 | 3.36 |
| 拗ねる | 4 | 3.97 |
| 余波 | 4 | 4.06 |
| 個体 | 4 | 3.56 |
| 愚か | 4 | 3.48 |
| この中 | 4 | 3.83 |
| 果して | 4 | 4.34 |
| 驚いたことに | 4 | 4.63 |
| 反転 | 4 | 3.97 |
| 下さる | 4 | 3.31 |
| 見入る | 4 | 4.39 |
| 未開 | 4 | 4.61 |
| ピンチ | 4 | 4.16 |
| 高速 | 4 | 3.51 |
| 大家族 | 4 | 5.30 |
| 時半 | 4 | 4.42 |
| 雅語 | 4 | 4.02 |
| 互いに | 4 | 3.41 |
| 山道 | 4 | 4.20 |
| 正午 | 4 | 4.44 |
| 喋り | 4 | 3.80 |
| 目指し | 4 | 3.53 |
| 秘密 | 4 | 3.31 |
| してみると | 4 | 4.17 |
| 食器 | 4 | 3.99 |
| 喜色 | 4 | 4.53 |
| 汁 | 4 | 3.50 |
| ダメージを与える | 4 | 4.24 |
| 職業 | 4 | 3.37 |
| 老け | 4 | 4.90 |
| ひと月 | 4 | 4.26 |
| 質の良い | 4 | 4.84 |
| 欲情 | 4 | 4.77 |
| 出来事 | 4 | 3.32 |
| 意外 | 4 | 3.21 |
| 気にしない | 4 | 3.68 |
| 荒らす | 4 | 4.10 |
| 至極 | 4 | 4.03 |
| 香辛料 | 4 | 4.12 |
| 気合 | 4 | 3.69 |
| 元い | 4 | 4.01 |
| 預かる | 4 | 3.59 |
| 一度に | 4 | 3.99 |
| 膝 | 4 | 3.14 |
| その日 | 4 | 3.31 |
| 時間帯 | 4 | 3.96 |
| 伯父さん | 4 | 3.54 |
| 深夜 | 4 | 3.90 |
| 当の | 4 | 3.96 |
| 凌ぐ | 4 | 4.07 |
| 土下座 | 4 | 3.89 |
| 火照る | 4 | 4.55 |
| 回り | 4 | 3.63 |
| 灰色 | 4 | 3.56 |
| 殆どない | 4 | 3.92 |
| すか | 4 | 3.90 |
| それ相応 | 4 | 4.25 |
| 本来なら | 4 | 3.43 |
| 超大物 | 4 | 5.75 |
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