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 |
|---|---|---|
| 一声 | 1 | 4.20 |
| 重複 | 1 | 4.67 |
| へ理屈 | 1 | 6.28 |
| 我が物顔 | 1 | 4.78 |
| 甚だ | 1 | 4.61 |
| 元来 | 1 | 4.37 |
| 笑い顔 | 1 | 5.17 |
| ものの見事に | 1 | 5.05 |
| お伺い | 1 | 4.36 |
| ワイワイ | 1 | 4.87 |
| 大嫌い | 1 | 4.30 |
| 一しきり | 1 | 4.25 |
| スズメ | 1 | 4.85 |
| 実を言うと | 1 | 4.70 |
| 順に | 1 | 4.01 |
| ツンと | 1 | 4.72 |
| 男らしい | 1 | 4.33 |
| 添え木 | 1 | 5.42 |
| 議題 | 1 | 4.33 |
| ぶち当たる | 1 | 5.04 |
| 引っ張り | 1 | 3.84 |
| 先頭に立つ | 1 | 4.78 |
| 出る前 | 1 | 4.46 |
| 揉める | 1 | 4.27 |
| 円柱状 | 1 | 5.29 |
| 山梨 | 1 | 5.62 |
| 分け与える | 1 | 4.46 |
| つかえる | 1 | 4.94 |
| クソッ | 1 | 4.20 |
| 押し上げ | 1 | 4.59 |
| 無機質 | 1 | 4.31 |
| 自殺行為 | 1 | 4.41 |
| ラッキースケベ | 1 | 5.16 |
| 必殺技 | 1 | 4.31 |
| 尻もち | 1 | 4.83 |
| 称える | 1 | 4.46 |
| 腐れ縁 | 1 | 4.90 |
| 手のもの | 1 | 4.70 |
| 裏付ける | 1 | 4.69 |
| 戦意喪失 | 1 | 5.19 |
| 学理 | 1 | 4.81 |
| 成り上がる | 1 | 4.61 |
| 税込み | 1 | 5.97 |
| 危なっかしい | 1 | 4.49 |
| 軽々しい | 1 | 4.45 |
| ほっといて | 1 | 4.77 |
| 格別 | 1 | 4.50 |
| 平べったい | 1 | 5.10 |
| 取り巻く | 1 | 4.25 |
| 鬼に金棒 | 1 | 5.56 |
| 国交樹立 | 1 | 5.89 |
| 細々 | 1 | 4.60 |
| 綻ぶ | 1 | 4.10 |
| 戒める | 1 | 4.81 |
| 後衛 | 1 | 3.77 |
| 灯る | 1 | 4.09 |
| 山菜採り | 1 | 5.71 |
| 卒業生 | 1 | 4.49 |
| か弱い | 1 | 4.28 |
| 入学 | 1 | 3.63 |
| 陣取る | 1 | 4.07 |
| 見上げるよう | 1 | 4.86 |
| 工具 | 1 | 4.62 |
| 晴れて | 1 | 4.13 |
| 絡み | 1 | 4.14 |
| 売り込む | 1 | 4.69 |
| 作戦会議 | 1 | 4.31 |
| たらし | 1 | 4.95 |
| お休みなさい | 1 | 4.33 |
| 修学旅行 | 1 | 4.46 |
| あははは | 1 | 4.32 |
| むかっ | 1 | 4.68 |
| 考えつく | 1 | 4.55 |
| 三山 | 1 | 4.20 |
| 遠方 | 1 | 4.06 |
| 活発 | 1 | 4.19 |
| 身命 | 1 | 4.97 |
| 六十代 | 1 | 5.56 |
| ようと | 1 | 4.57 |
| つき出し | 1 | 5.61 |
| 出身 | 1 | 3.59 |
| 義勇軍 | 1 | 4.89 |
| いけ好かない | 1 | 4.87 |
| 上半身裸 | 1 | 4.77 |
| 適度 | 1 | 4.05 |
| 造反者 | 1 | 6.28 |
| 流線型 | 1 | 5.19 |
| 感知 | 1 | 3.27 |
| ご丁寧 | 1 | 4.28 |
| 肝 | 1 | 3.97 |
| 強き | 1 | 4.53 |
| 口癖 | 1 | 4.67 |
| 現在値 | 1 | 6.17 |
| 汚す | 1 | 4.07 |
| 追いやる | 1 | 4.06 |
| お近づき | 1 | 4.90 |
| 別宅 | 1 | 4.90 |
| 憚る | 1 | 4.83 |
| 本題にはいる | 1 | 6.35 |
| 経費 | 1 | 4.45 |
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