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 |
|---|---|---|
| 一号 | 1 | 4.42 |
| 恐慌 | 1 | 4.40 |
| 名に恥じない | 1 | 5.16 |
| であるから | 1 | 3.77 |
| 妖異 | 1 | 5.80 |
| 幼馴染 | 1 | 3.65 |
| ワゴン車 | 1 | 5.73 |
| 尻餅をつく | 1 | 5.07 |
| 真に | 1 | 4.02 |
| 本職 | 1 | 4.30 |
| 二か所 | 1 | 5.32 |
| 暴れ回る | 1 | 4.89 |
| ジジイ | 1 | 4.14 |
| 会わせる | 1 | 4.33 |
| 搦み | 1 | 4.38 |
| 波紋 | 1 | 4.32 |
| 野バラ | 1 | 4.97 |
| 年弱 | 1 | 5.67 |
| 単刀直入 | 1 | 4.39 |
| 危機的 | 1 | 4.58 |
| 理解しがたい | 1 | 5.05 |
| ガス | 1 | 3.77 |
| 他愛ない | 1 | 5.00 |
| 続 | 1 | 4.72 |
| 毀れ | 1 | 4.33 |
| 心証 | 1 | 4.87 |
| 野牡丹 | 1 | 4.45 |
| 覗く | 1 | 3.34 |
| よりか | 1 | 4.47 |
| 震えだす | 1 | 5.13 |
| 自分から | 1 | 3.64 |
| もさい | 1 | 5.79 |
| 重点 | 1 | 4.73 |
| 述べる | 1 | 3.41 |
| たらふく | 1 | 4.91 |
| 暇を見て | 1 | 5.47 |
| うめー | 1 | 5.22 |
| 家着 | 1 | 6.75 |
| 今一 | 1 | 3.88 |
| 申し分のない | 1 | 5.30 |
| しくじる | 1 | 4.59 |
| 盆 | 1 | 4.58 |
| 理性 | 1 | 3.79 |
| 段ボール箱 | 1 | 5.51 |
| 切り返す | 1 | 4.82 |
| 中庭 | 1 | 3.72 |
| おまけ | 1 | 3.96 |
| どうにかこうにか | 1 | 4.95 |
| 球 | 1 | 3.56 |
| 取りつく | 1 | 4.82 |
| お祭り騒ぎ | 1 | 4.64 |
| 莫大 | 1 | 3.88 |
| 晴れやかな笑顔 | 1 | 5.23 |
| お嬢 | 1 | 3.75 |
| 貢献 | 1 | 4.04 |
| 生計を立てる | 1 | 5.49 |
| 落 | 1 | 4.45 |
| 両開き | 1 | 4.74 |
| 言いきれない | 1 | 5.42 |
| 象 | 1 | 4.41 |
| 石の上にも三年 | 1 | 6.94 |
| 避けては通れない | 1 | 5.24 |
| お近づきになる | 1 | 6.04 |
| なんす | 1 | 4.63 |
| 流れる | 1 | 3.28 |
| 肺 | 1 | 4.14 |
| 国交 | 1 | 4.55 |
| 踏破 | 1 | 4.01 |
| 言うて | 1 | 4.57 |
| 人出 | 1 | 4.66 |
| 時つ | 1 | 5.65 |
| 知名度 | 1 | 4.50 |
| 本体 | 1 | 3.63 |
| フラフラ | 1 | 4.22 |
| 適度 | 1 | 4.05 |
| 悪気 | 1 | 4.35 |
| 気にするな | 1 | 3.91 |
| 無我夢中 | 1 | 4.73 |
| 根回し | 1 | 4.30 |
| ホームシック | 1 | 5.23 |
| 揉みくちゃ | 1 | 4.78 |
| 相対的 | 1 | 4.71 |
| 膠着 | 1 | 4.87 |
| 肌寒 | 1 | 5.20 |
| ウヨウヨ | 1 | 5.60 |
| 防波堤 | 1 | 4.86 |
| 進行方向 | 1 | 4.29 |
| タコ | 1 | 4.20 |
| 集結 | 1 | 4.16 |
| 出身 | 1 | 3.59 |
| いっそ | 1 | 3.65 |
| お食事処 | 1 | 6.25 |
| 三原色 | 1 | 6.25 |
| 何時しか | 1 | 4.04 |
| 荒稼ぎ | 1 | 5.13 |
| 葉野菜 | 1 | 5.07 |
| こらえ性 | 1 | 5.74 |
| 叔母 | 1 | 4.22 |
| 昇天 | 1 | 4.82 |
| 絶滅 | 1 | 4.48 |
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