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 |
|---|---|---|
| 大家族 | 4 | 5.30 |
| 熟す | 4 | 3.95 |
| 有意義 | 4 | 4.32 |
| 膨れ | 4 | 3.99 |
| 力説 | 4 | 4.55 |
| 正門 | 4 | 3.93 |
| 女らしい | 4 | 4.41 |
| 振動 | 4 | 3.60 |
| 間違える | 4 | 3.64 |
| 煩わしい | 4 | 4.35 |
| 方位磁石 | 4 | 5.41 |
| 奥義 | 4 | 4.10 |
| 人生経験 | 4 | 4.89 |
| 余波 | 4 | 4.06 |
| 心情 | 4 | 3.87 |
| がかる | 4 | 4.18 |
| 元い | 4 | 4.01 |
| 呼び出し | 4 | 3.79 |
| 点者 | 4 | 3.84 |
| 保有 | 4 | 3.92 |
| 早 | 4 | 3.69 |
| 本来なら | 4 | 3.43 |
| 末 | 4 | 3.86 |
| 赤子 | 4 | 3.98 |
| 斬 | 4 | 3.68 |
| 十三 | 4 | 3.87 |
| 閉じる | 4 | 3.13 |
| 見入る | 4 | 4.39 |
| 為される | 4 | 4.48 |
| 稀 | 4 | 3.91 |
| 透ける | 4 | 4.13 |
| 無くして | 4 | 4.04 |
| 遠ざける | 4 | 4.03 |
| 号令 | 4 | 4.02 |
| 始末 | 4 | 3.55 |
| そうする | 4 | 3.75 |
| 連行 | 4 | 4.13 |
| 占める | 4 | 3.97 |
| 嫡男 | 4 | 4.13 |
| 方策 | 4 | 4.48 |
| 毒 | 4 | 2.97 |
| 残り物 | 4 | 5.12 |
| いざという時 | 4 | 4.00 |
| みたいです | 4 | 3.46 |
| 男爵 | 4 | 3.29 |
| 入手 | 4 | 3.64 |
| それ相応 | 4 | 4.25 |
| 頷ける | 4 | 4.19 |
| 筋 | 4 | 3.68 |
| 暮れ | 4 | 4.07 |
| 米 | 4 | 3.70 |
| 女心 | 4 | 4.79 |
| デニム | 4 | 5.25 |
| 四百 | 4 | 4.36 |
| ホール | 4 | 3.84 |
| 評議員 | 4 | 5.13 |
| 話し込む | 4 | 4.37 |
| まくし立てる | 4 | 4.54 |
| 相まって | 4 | 4.02 |
| 埋蔵金 | 4 | 5.71 |
| 丘 | 4 | 3.57 |
| 深夜 | 4 | 3.90 |
| 絶好 | 4 | 4.17 |
| その先 | 4 | 3.57 |
| 利く | 4 | 3.59 |
| 相殺 | 4 | 4.04 |
| 小山 | 4 | 4.56 |
| 宿る | 4 | 3.56 |
| 宮殿 | 4 | 3.85 |
| 火燵 | 4 | 4.74 |
| 無さそう | 4 | 3.37 |
| アタッシュケース | 4 | 5.22 |
| 縦 | 4 | 3.75 |
| 合格者 | 4 | 4.99 |
| 税金 | 4 | 4.20 |
| 両肩 | 4 | 4.21 |
| 覆う | 4 | 3.25 |
| 髪の毛 | 4 | 3.78 |
| 豊か | 4 | 3.61 |
| 動き出す | 4 | 3.46 |
| 切断 | 4 | 3.70 |
| 小型 | 4 | 3.70 |
| 男たち | 4 | 3.49 |
| してみると | 4 | 4.17 |
| 亀 | 4 | 3.74 |
| 超大物 | 4 | 5.75 |
| 華やか | 4 | 4.02 |
| 対して | 4 | 3.82 |
| 入り組む | 4 | 4.49 |
| 一目 | 4 | 3.72 |
| クレーター | 4 | 4.29 |
| 草木 | 4 | 4.26 |
| 草原 | 4 | 3.51 |
| 頷き | 4 | 3.24 |
| 短時間 | 4 | 3.94 |
| 道具 | 4 | 3.19 |
| 特段 | 4 | 4.69 |
| 十月 | 4 | 4.65 |
| 貴殿 | 4 | 3.96 |
| けれど | 4 | 2.43 |
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