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 |
|---|---|---|
| 内争 | 3 | 4.75 |
| 過ぎたこと | 3 | 4.75 |
| 避難 | 3 | 3.64 |
| 取っておき | 3 | 4.45 |
| 休まる | 3 | 4.66 |
| 些細 | 3 | 3.89 |
| 密林 | 3 | 4.53 |
| 中二病 | 3 | 4.53 |
| 分布 | 3 | 4.72 |
| 巡る | 3 | 3.83 |
| 細め | 3 | 3.57 |
| 飛びまわる | 3 | 5.28 |
| 有る | 3 | 3.04 |
| 潤む | 3 | 4.00 |
| 二九 | 3 | 4.05 |
| 発散 | 3 | 4.30 |
| 受けつける | 3 | 5.63 |
| ハンドバッグ | 3 | 5.85 |
| 口ぶり | 3 | 4.18 |
| 透き通る | 3 | 4.03 |
| 超高級 | 3 | 5.08 |
| 丸い | 3 | 3.92 |
| 一室 | 3 | 3.82 |
| 怠る | 3 | 3.91 |
| 深 | 3 | 3.89 |
| 開発計画 | 3 | 5.39 |
| 沈黙 | 3 | 3.25 |
| 発端 | 3 | 4.37 |
| 住み込み | 3 | 4.67 |
| 手首 | 3 | 3.69 |
| 旅行 | 3 | 3.86 |
| 隙間 | 3 | 3.44 |
| でしたら | 3 | 3.49 |
| 八割 | 3 | 4.53 |
| 若しか | 3 | 4.45 |
| 刑罰 | 3 | 4.82 |
| 空高く | 3 | 4.53 |
| 高校 | 3 | 3.71 |
| 生け捕り | 3 | 4.56 |
| もっとも | 3 | 2.94 |
| 人目 | 3 | 3.91 |
| モニター | 3 | 3.83 |
| 曲がる | 3 | 3.96 |
| 注視 | 3 | 4.09 |
| 取り決め | 3 | 4.37 |
| 話し方 | 3 | 4.27 |
| 提示 | 3 | 3.79 |
| ネクタイ | 3 | 4.66 |
| アゴ | 3 | 4.78 |
| 詳しくは | 3 | 3.95 |
| 気にしないで | 3 | 3.81 |
| うるうる | 3 | 4.71 |
| 間を置く | 3 | 5.46 |
| ザクザク | 3 | 5.13 |
| 冷え込み | 3 | 5.43 |
| 気持ちいい | 3 | 4.07 |
| この目で | 3 | 4.34 |
| 直し | 3 | 3.54 |
| 差しだす | 3 | 5.07 |
| 緑 | 3 | 3.32 |
| 一閃 | 3 | 3.92 |
| 教えを乞う | 3 | 5.23 |
| 睡魔 | 3 | 4.57 |
| びっしり | 3 | 4.44 |
| 旨み | 3 | 4.51 |
| 雪 | 3 | 3.11 |
| この辺 | 3 | 3.73 |
| 組織 | 3 | 3.25 |
| 秘める | 3 | 3.75 |
| 臨時 | 3 | 4.04 |
| 引き渡す | 3 | 4.26 |
| 部 | 3 | 3.30 |
| どうとでも | 3 | 4.32 |
| ソロ | 3 | 3.76 |
| 話をする | 3 | 3.66 |
| 立ち回り | 3 | 4.47 |
| 集る | 3 | 4.17 |
| 砂地 | 3 | 4.76 |
| 閉める | 3 | 3.66 |
| 貝 | 3 | 4.21 |
| 等分 | 3 | 4.78 |
| 幾分 | 3 | 4.07 |
| 目立つ | 3 | 3.21 |
| 除く | 3 | 3.78 |
| 倒さ | 3 | 3.79 |
| 召す | 3 | 4.19 |
| 猛者 | 3 | 3.76 |
| ありがと | 3 | 3.60 |
| カテ | 3 | 6.55 |
| シワ | 3 | 4.50 |
| 路 | 3 | 3.84 |
| 巣食う | 3 | 4.70 |
| 為になる | 3 | 4.41 |
| 卑屈 | 3 | 4.54 |
| 何事もなかったかのように | 3 | 4.37 |
| 甲高い | 3 | 3.95 |
| 整える | 3 | 3.55 |
| 滑り落ちる | 3 | 4.53 |
| 卸す | 3 | 4.68 |
| 切り上げ | 3 | 4.28 |
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