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 |
|---|---|---|
| 硬貨 | 1 | 4.31 |
| 万一 | 1 | 4.30 |
| 今後とも | 1 | 4.40 |
| 弱い者 | 1 | 4.73 |
| 震わせる | 1 | 3.45 |
| 掌 | 1 | 3.53 |
| 立憲君主制 | 1 | 5.78 |
| ひと先ず | 1 | 3.58 |
| 名残 | 1 | 4.36 |
| 申し分ない | 1 | 4.47 |
| 書籍化 | 1 | 4.50 |
| 指し示す | 1 | 3.98 |
| 天恵 | 1 | 4.89 |
| 静けさ | 1 | 4.37 |
| 興味をそそる | 1 | 5.91 |
| 二十七 | 1 | 4.91 |
| 補助 | 1 | 3.65 |
| グッジョブ | 1 | 4.95 |
| 恥ずかしながら | 1 | 4.62 |
| 険しい顔つき | 1 | 5.46 |
| 軍務 | 1 | 4.16 |
| 並 | 1 | 3.70 |
| 毛 | 1 | 3.69 |
| 突出して | 1 | 4.66 |
| 噴く | 1 | 4.23 |
| 訪ねる | 1 | 3.68 |
| 要因 | 1 | 3.90 |
| 繕い | 1 | 5.28 |
| トロい | 1 | 5.84 |
| 襟章 | 1 | 6.29 |
| 前例 | 1 | 4.29 |
| 他言 | 1 | 4.90 |
| 味噌スープ | 1 | 6.61 |
| 宴会場 | 1 | 4.94 |
| と書いてある | 1 | 4.63 |
| 旧知 | 1 | 4.80 |
| お決まり | 1 | 4.60 |
| 晴れ舞台 | 1 | 5.13 |
| 抉る | 1 | 3.74 |
| ギリギリまで | 1 | 4.33 |
| つき合う | 1 | 4.70 |
| 四つん這い | 1 | 4.58 |
| キツい | 1 | 4.55 |
| 心底 | 1 | 3.64 |
| 懸かる | 1 | 4.94 |
| 拒絶 | 1 | 3.76 |
| 山中 | 1 | 4.43 |
| 遡る | 1 | 4.13 |
| 味方 | 1 | 3.17 |
| カニ | 1 | 4.22 |
| グダグダ | 1 | 4.74 |
| 肉屋 | 1 | 4.43 |
| 宙に浮く | 1 | 4.88 |
| 現物 | 1 | 4.54 |
| 忌諱 | 1 | 5.91 |
| 船 | 1 | 2.84 |
| 評価 | 1 | 3.17 |
| 都市部 | 1 | 4.68 |
| 如何わしい | 1 | 4.75 |
| 剛毅 | 1 | 5.05 |
| 大がかり | 1 | 4.90 |
| あははは | 1 | 4.32 |
| 得体 | 1 | 4.51 |
| たおやか | 1 | 4.80 |
| 電力 | 1 | 4.83 |
| 球 | 1 | 3.56 |
| 痛い目 | 1 | 4.28 |
| 想像力 | 1 | 4.49 |
| ありがち | 1 | 4.52 |
| 徴兵制度 | 1 | 6.45 |
| 五十日 | 1 | 4.07 |
| 夜霧 | 1 | 5.09 |
| 濡らす | 1 | 4.14 |
| 溶ける | 1 | 3.59 |
| 専ら | 1 | 4.38 |
| 象 | 1 | 4.41 |
| どんと来い | 1 | 5.31 |
| 予想外 | 1 | 3.46 |
| 陥没 | 1 | 4.46 |
| 海面下 | 1 | 5.64 |
| ボソッと | 1 | 4.76 |
| 退散 | 1 | 4.35 |
| 毛ほど | 1 | 5.10 |
| 無邪気 | 1 | 3.81 |
| ホームシック | 1 | 5.23 |
| ウサギ | 1 | 3.75 |
| 空ける | 1 | 4.24 |
| 一晩 | 1 | 3.96 |
| 低空飛行 | 1 | 5.05 |
| 秋田 | 1 | 5.38 |
| 恨む | 1 | 3.75 |
| 煮込み | 1 | 4.33 |
| お祭り気分 | 1 | 5.78 |
| 好い | 1 | 4.38 |
| 一眠り | 1 | 5.07 |
| べっとり | 1 | 5.00 |
| 湧き出す | 1 | 5.11 |
| スッと | 1 | 4.17 |
| 手の甲 | 1 | 4.14 |
| 曾 | 1 | 4.91 |
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