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 |
|---|---|---|
| 持ち主 | 1 | 3.54 |
| 木の実 | 1 | 4.22 |
| うまいこと | 1 | 4.68 |
| 野分 | 1 | 5.13 |
| コショウ | 1 | 5.13 |
| まとめ役 | 1 | 4.67 |
| 不確実 | 1 | 5.44 |
| 羨望の的 | 1 | 5.81 |
| 日永 | 1 | 4.91 |
| キッと | 1 | 4.49 |
| 高級車 | 1 | 5.40 |
| 下欄 | 1 | 4.87 |
| 言い争い | 1 | 4.45 |
| 害す | 1 | 4.17 |
| 受けつけ | 1 | 6.17 |
| お昼 | 1 | 3.71 |
| 生真面目 | 1 | 4.37 |
| すい | 1 | 3.66 |
| 手当たり次第 | 1 | 4.89 |
| 八方塞がり | 1 | 5.26 |
| 否々 | 1 | 3.79 |
| 豆鉄砲 | 1 | 5.13 |
| 誘惑 | 1 | 4.00 |
| 自粛 | 1 | 5.02 |
| お伺い | 1 | 4.36 |
| 指折り | 1 | 4.52 |
| 名案 | 1 | 4.50 |
| 気苦労 | 1 | 4.80 |
| せえ | 1 | 4.65 |
| 道なき道 | 1 | 5.07 |
| と書いてある | 1 | 4.63 |
| デザイン | 1 | 3.62 |
| シルク | 1 | 4.72 |
| 低学年 | 1 | 4.99 |
| 産物 | 1 | 4.37 |
| 三原色 | 1 | 6.25 |
| 親交を深める | 1 | 5.34 |
| に過ぎない | 1 | 3.53 |
| 暴走 | 1 | 3.42 |
| 肩にかかる | 1 | 5.42 |
| 太刀 | 1 | 4.08 |
| 住まう | 1 | 4.00 |
| 亡くす | 1 | 4.05 |
| 安堵感 | 1 | 4.94 |
| お坊ちゃま | 1 | 5.05 |
| ハツラツ | 1 | 5.79 |
| むくり | 1 | 4.82 |
| ペシペシ | 1 | 5.07 |
| 待ち合わせる | 1 | 5.31 |
| 蔦 | 1 | 3.96 |
| ブーケ | 1 | 4.91 |
| 幾世 | 1 | 4.37 |
| あれこれ | 1 | 3.89 |
| 独占 | 1 | 4.03 |
| 夢のまた夢 | 1 | 4.95 |
| 防波堤 | 1 | 4.86 |
| 排泄物 | 1 | 4.96 |
| 発意 | 1 | 3.84 |
| 火の玉 | 1 | 4.19 |
| 叔母 | 1 | 4.22 |
| 同義 | 1 | 4.38 |
| つき合い | 1 | 4.64 |
| 爆撃 | 1 | 4.16 |
| 形式的 | 1 | 4.90 |
| キャッ | 1 | 4.92 |
| ハート形 | 1 | 5.91 |
| 厨房 | 1 | 3.70 |
| 気が進まない | 1 | 4.84 |
| 賢い | 1 | 3.83 |
| 集中力 | 1 | 4.05 |
| 萎える | 1 | 4.82 |
| 汝 | 1 | 3.78 |
| 軍務 | 1 | 4.16 |
| 的外れ | 1 | 4.57 |
| 甚い | 1 | 3.90 |
| 絶やす | 1 | 4.46 |
| 根気 | 1 | 4.81 |
| 遡る | 1 | 4.13 |
| 上を行く | 1 | 5.02 |
| アーチ | 1 | 4.55 |
| お粗末 | 1 | 4.66 |
| 好い | 1 | 4.38 |
| 周章てる | 1 | 5.45 |
| 炊飯 | 1 | 5.54 |
| ボソッと | 1 | 4.76 |
| 突きつける | 1 | 3.74 |
| 表面的 | 1 | 4.77 |
| 懐中電灯 | 1 | 4.78 |
| 随一 | 1 | 4.45 |
| 有数 | 1 | 4.41 |
| 拘束 | 1 | 3.37 |
| 向こう側 | 1 | 3.66 |
| 吹きすさぶ | 1 | 5.09 |
| 望み | 1 | 3.62 |
| 女ども | 1 | 5.00 |
| 真横 | 1 | 4.14 |
| 雑貨店 | 1 | 5.08 |
| 立ちのぼる | 1 | 5.27 |
| 雨風 | 1 | 4.94 |
| 自己中心的 | 1 | 5.12 |
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