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 |
|---|---|---|
| 牽引 | 1 | 4.78 |
| 位の高い | 1 | 5.21 |
| 難を逃れる | 1 | 5.57 |
| 包み | 1 | 3.81 |
| 狭し | 1 | 4.33 |
| 幼馴染 | 1 | 3.65 |
| 下世話 | 1 | 4.94 |
| フィアンセ | 1 | 5.27 |
| 年明け | 1 | 4.78 |
| 初めまして | 1 | 3.73 |
| 公家 | 1 | 4.33 |
| 至近 | 1 | 4.73 |
| 快感 | 1 | 4.52 |
| 二国間 | 1 | 5.52 |
| できるだけ早く | 1 | 4.83 |
| 公共工事 | 1 | 5.91 |
| 暴走 | 1 | 3.42 |
| 後ろ向き | 1 | 4.59 |
| 覆水盆に返らず | 1 | 6.10 |
| これぞ | 1 | 4.40 |
| 平べったい | 1 | 5.10 |
| 宝の山 | 1 | 4.98 |
| 地殻 | 1 | 5.25 |
| 妾 | 1 | 3.36 |
| 買い入れる | 1 | 5.73 |
| 原形 | 1 | 4.85 |
| 混乱 | 1 | 3.09 |
| 寝所 | 1 | 4.51 |
| r | 1 | 5.18 |
| 一苦労 | 1 | 4.51 |
| 日付 | 1 | 4.20 |
| 何事 | 1 | 4.06 |
| 防波堤 | 1 | 4.86 |
| たび重なる | 1 | 6.16 |
| モデル | 1 | 4.07 |
| 成婚 | 1 | 5.18 |
| 柵 | 1 | 3.75 |
| 上は | 1 | 4.00 |
| 緑茶 | 1 | 4.64 |
| ボルテージ | 1 | 5.14 |
| 中腹 | 1 | 4.54 |
| しぶとい | 1 | 4.44 |
| 犢鼻褌 | 1 | 4.77 |
| 人間らしい | 1 | 4.40 |
| 体毛 | 1 | 4.32 |
| 切り詰め | 1 | 5.47 |
| 節理 | 1 | 6.18 |
| 見違える | 1 | 4.66 |
| 軟 | 1 | 5.26 |
| 噛み応え | 1 | 5.36 |
| 作戦会議 | 1 | 4.31 |
| ブスリ | 1 | 5.78 |
| 疑問符 | 1 | 4.36 |
| トラック | 1 | 4.25 |
| 当てられる | 1 | 4.62 |
| 料 | 1 | 4.29 |
| 渡船 | 1 | 5.34 |
| 砂煙 | 1 | 4.65 |
| 九割 | 1 | 4.61 |
| 通じて | 1 | 4.12 |
| 十九 | 1 | 4.51 |
| 星々 | 1 | 4.41 |
| 振り切る | 1 | 4.01 |
| 感傷 | 1 | 4.46 |
| トイレ | 1 | 3.70 |
| 極刑 | 1 | 4.85 |
| 取り上げ | 1 | 4.11 |
| 繕い | 1 | 5.28 |
| バカ者 | 1 | 5.25 |
| 有事 | 1 | 4.24 |
| 地蜘蛛 | 1 | 5.69 |
| 害獣 | 1 | 4.66 |
| 重複 | 1 | 4.67 |
| 行き違い | 1 | 4.90 |
| 現金 | 1 | 4.23 |
| 死人 | 1 | 3.99 |
| 残忍 | 1 | 4.77 |
| 赤々 | 1 | 4.78 |
| 手早い | 1 | 3.97 |
| ラッキー | 1 | 4.25 |
| 千年 | 1 | 3.80 |
| 取りにくい | 1 | 5.45 |
| 八月 | 1 | 4.62 |
| 照れ笑い | 1 | 4.97 |
| 定宿 | 1 | 5.35 |
| 旨 | 1 | 4.04 |
| すぱっと | 1 | 4.98 |
| 不祥事 | 1 | 4.82 |
| 言いぶり | 1 | 6.05 |
| 地割れ | 1 | 4.98 |
| 狭 | 1 | 4.56 |
| ばった | 1 | 4.90 |
| 均衡 | 1 | 4.25 |
| 応接間 | 1 | 4.41 |
| 差し上げ | 1 | 4.65 |
| 居住まい | 1 | 4.66 |
| 諦めが悪い | 1 | 5.49 |
| 出ばなをくじく | 1 | 7.29 |
| 出る前 | 1 | 4.46 |
| 天空 | 1 | 3.91 |
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