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 |
|---|---|---|
| 主導権 | 1 | 4.31 |
| 悪文 | 1 | 6.46 |
| 薄々 | 1 | 4.22 |
| 意思決定 | 1 | 5.19 |
| うまく行く | 1 | 5.32 |
| 寝静まる | 1 | 4.67 |
| 叔母 | 1 | 4.22 |
| 受けつけ | 1 | 6.17 |
| ふーん | 1 | 3.74 |
| わっ | 1 | 3.63 |
| 手短 | 1 | 4.51 |
| 噂話 | 1 | 4.18 |
| 久しく | 1 | 4.70 |
| 冷静になる | 1 | 4.82 |
| 手のもの | 1 | 4.70 |
| 順当 | 1 | 4.53 |
| 女中 | 1 | 4.42 |
| しょうもない | 1 | 4.78 |
| お使い | 1 | 4.22 |
| 信仰 | 1 | 3.64 |
| 耐え忍ぶ | 1 | 4.96 |
| 焼きもち | 1 | 4.88 |
| 枠 | 1 | 3.79 |
| 分り | 1 | 5.35 |
| マンガ | 1 | 4.26 |
| 見繕う | 1 | 4.37 |
| 成功報酬 | 1 | 5.01 |
| 目のあたりにする | 1 | 6.39 |
| あっ気 | 1 | 4.67 |
| 取り上げ | 1 | 4.11 |
| 欠かさず | 1 | 4.80 |
| だら | 1 | 4.62 |
| 意思表示 | 1 | 4.50 |
| 生み出す | 1 | 3.25 |
| 生体 | 1 | 4.28 |
| 息遣い | 1 | 4.51 |
| 生き物 | 1 | 3.36 |
| 浴衣 | 1 | 4.38 |
| ザラ | 1 | 4.99 |
| 向う岸 | 1 | 6.48 |
| 収容 | 1 | 4.35 |
| あろうことか | 1 | 4.40 |
| 郊外 | 1 | 4.29 |
| ナビゲーター | 1 | 5.67 |
| デフォルト | 1 | 4.66 |
| 軍事演習 | 1 | 5.30 |
| 群生 | 1 | 4.87 |
| 天恵 | 1 | 4.89 |
| 太刀 | 1 | 4.08 |
| もがく | 1 | 4.18 |
| どうにかこうにか | 1 | 4.95 |
| 気にかける | 1 | 4.85 |
| 自己中心的 | 1 | 5.12 |
| 畑 | 1 | 3.50 |
| 先の話 | 1 | 4.46 |
| マスター | 1 | 3.10 |
| 寄越す | 1 | 3.88 |
| 雑談 | 1 | 3.82 |
| 煌き | 1 | 4.69 |
| 取り調べ | 1 | 4.63 |
| 目蓋 | 1 | 4.22 |
| 一升瓶 | 1 | 5.45 |
| 格納 | 1 | 4.53 |
| 宥める | 1 | 3.82 |
| 容貌 | 1 | 4.22 |
| どうこう | 1 | 3.96 |
| 御 | 1 | 3.20 |
| アンバランス | 1 | 4.80 |
| 再燃 | 1 | 5.08 |
| 問題点 | 1 | 4.29 |
| かむ | 1 | 4.61 |
| 通り道 | 1 | 4.66 |
| 第一位 | 1 | 4.58 |
| 飛び越える | 1 | 4.05 |
| 年後 | 1 | 4.14 |
| 普通車 | 1 | 6.22 |
| 機 | 1 | 3.04 |
| 冒す | 1 | 4.37 |
| 座右 | 1 | 6.75 |
| 衾 | 1 | 5.17 |
| 鰐 | 1 | 4.09 |
| 恒例行事 | 1 | 5.13 |
| にらみ合う | 1 | 4.89 |
| 轍 | 1 | 4.75 |
| 小動物 | 1 | 4.13 |
| 秋田 | 1 | 5.38 |
| 要素 | 1 | 3.51 |
| 識別 | 1 | 4.04 |
| お披露目 | 1 | 4.09 |
| 熱力学第二法則 | 1 | 7.59 |
| にかっと | 1 | 4.71 |
| 手探り | 1 | 4.60 |
| つかえる | 1 | 4.94 |
| 滑空 | 1 | 4.54 |
| 八つ目 | 1 | 4.96 |
| カラスの行水 | 1 | 6.28 |
| 凝らす | 1 | 4.08 |
| 十二月 | 1 | 4.77 |
| 段差 | 1 | 4.63 |
| 官爵 | 1 | 5.85 |
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