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 |
|---|---|---|
| キープ | 5 | 4.49 |
| 商売 | 5 | 3.44 |
| 置き | 5 | 3.70 |
| 遅れる | 5 | 3.60 |
| 食い入るように | 5 | 4.49 |
| 折り畳み式 | 5 | 5.43 |
| 定期的 | 5 | 3.83 |
| 持参 | 5 | 4.31 |
| 立てる | 5 | 3.28 |
| ミミズ | 5 | 4.57 |
| 見下す | 5 | 3.89 |
| 演台 | 5 | 5.57 |
| ソファ | 5 | 3.68 |
| 貝毒 | 5 | 6.59 |
| 血抜き | 5 | 4.46 |
| バランス | 5 | 3.55 |
| ものか | 5 | 3.30 |
| 親子 | 5 | 3.74 |
| 順番 | 5 | 3.86 |
| 天幕 | 5 | 3.80 |
| 思惑 | 5 | 3.62 |
| 謙遜 | 5 | 4.25 |
| 脚 | 5 | 3.41 |
| 所では | 5 | 3.87 |
| どこぞ | 5 | 4.10 |
| 隠し | 5 | 3.04 |
| 信用 | 5 | 3.34 |
| 無数 | 5 | 3.32 |
| 尋問 | 5 | 3.98 |
| 基本的に | 5 | 3.18 |
| 釣果 | 5 | 5.16 |
| 継承 | 5 | 3.89 |
| 幹 | 5 | 3.97 |
| 星空 | 5 | 4.26 |
| 達成 | 5 | 3.61 |
| 多すぎる | 5 | 4.09 |
| 安定した | 5 | 4.24 |
| ケガ | 5 | 4.21 |
| 険しい | 5 | 3.94 |
| 雄たけび | 5 | 4.74 |
| 時折 | 5 | 3.49 |
| 崩れる | 5 | 3.63 |
| グループ | 5 | 3.72 |
| 完了 | 5 | 3.44 |
| 決定 | 5 | 3.43 |
| 歴史 | 5 | 3.34 |
| お方 | 5 | 3.78 |
| 柔らか | 5 | 3.62 |
| 見やる | 5 | 3.65 |
| いい鴨 | 5 | 3.94 |
| 不可能 | 5 | 3.19 |
| 誓う | 5 | 3.69 |
| 湖 | 5 | 3.38 |
| 食べられる | 5 | 3.75 |
| 一夜 | 5 | 4.08 |
| キッチリ | 5 | 4.67 |
| 歩 | 5 | 3.66 |
| ハマる | 5 | 4.39 |
| 一千万 | 5 | 4.90 |
| 日本語 | 5 | 3.90 |
| 香り | 5 | 3.32 |
| 頭から | 5 | 3.72 |
| 法案 | 5 | 5.15 |
| 呼び出す | 5 | 3.54 |
| 散らし | 5 | 3.73 |
| バレる | 5 | 3.43 |
| 和やか | 5 | 4.15 |
| 自然薯 | 5 | 5.65 |
| モジモジ | 5 | 4.77 |
| 加速 | 5 | 3.47 |
| 着る | 5 | 3.35 |
| 借り | 5 | 3.40 |
| 飛ばす | 5 | 3.20 |
| 励む | 5 | 3.90 |
| 引き連れる | 5 | 3.77 |
| 束 | 5 | 3.82 |
| 連続 | 5 | 3.47 |
| 一体に | 5 | 4.71 |
| 忠告 | 5 | 3.72 |
| 相場 | 5 | 4.08 |
| 次々に | 5 | 3.79 |
| 悲惨 | 5 | 4.13 |
| 言いよう | 5 | 3.98 |
| 防ぐ | 5 | 3.23 |
| あっち | 5 | 3.48 |
| お淑やか | 5 | 4.70 |
| か所 | 5 | 4.76 |
| 発揮 | 5 | 3.35 |
| 極々 | 5 | 4.60 |
| 重鎮 | 5 | 4.16 |
| 合い | 5 | 3.68 |
| 樹脂 | 5 | 4.68 |
| なんというか | 5 | 3.68 |
| 本題 | 5 | 3.82 |
| 痕跡 | 5 | 3.90 |
| 臭い | 5 | 3.42 |
| 飛んだ | 5 | 3.76 |
| 心地いい | 5 | 4.65 |
| 覗き | 5 | 3.50 |
| 何より | 5 | 3.02 |
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