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 |
|---|---|---|
| 壮大 | 1 | 4.45 |
| 手のもの | 1 | 4.70 |
| 愛人 | 1 | 3.96 |
| 名刀 | 1 | 5.04 |
| 泣き付く | 1 | 5.30 |
| ビキニ | 1 | 4.64 |
| 空っぽ | 1 | 4.20 |
| しんと | 1 | 4.58 |
| 握力 | 1 | 4.59 |
| タコ | 1 | 4.20 |
| がら | 1 | 4.21 |
| どっぷり | 1 | 4.98 |
| 解す | 1 | 4.28 |
| 跳ね上がり | 1 | 4.95 |
| 萎縮 | 1 | 4.48 |
| 騒々しい | 1 | 4.48 |
| 対処法 | 1 | 4.40 |
| 伜 | 1 | 5.39 |
| 差し上げ | 1 | 4.65 |
| 山中 | 1 | 4.43 |
| 柔和 | 1 | 4.24 |
| 杞憂 | 1 | 4.21 |
| いい思いをする | 1 | 6.78 |
| 面白味 | 1 | 5.11 |
| 痛み入る | 1 | 4.85 |
| あー | 1 | 2.91 |
| 指す | 1 | 3.83 |
| せんと | 1 | 4.48 |
| 凝 | 1 | 4.49 |
| 悪うございました | 1 | 5.84 |
| 野犬 | 1 | 4.48 |
| 見通す | 1 | 4.46 |
| 補佐役 | 1 | 4.84 |
| ありがち | 1 | 4.52 |
| 白抜き | 1 | 6.34 |
| 味を調える | 1 | 5.80 |
| 健か | 1 | 4.65 |
| 慣れ親しむ | 1 | 4.52 |
| 助太刀 | 1 | 4.74 |
| 非現実的 | 1 | 4.77 |
| 立ち居振る舞い | 1 | 4.66 |
| 設計 | 1 | 3.97 |
| 遠方 | 1 | 4.06 |
| 断言 | 1 | 3.62 |
| いい感じ | 1 | 4.05 |
| 不注意 | 1 | 4.88 |
| 小さ目 | 1 | 5.61 |
| 溶く | 1 | 4.93 |
| ドリーム | 1 | 5.15 |
| 掃討 | 1 | 4.27 |
| 八万四千 | 1 | 6.99 |
| 表す | 1 | 3.61 |
| 釣竿 | 1 | 4.80 |
| 人間業 | 1 | 5.33 |
| やせ細る | 1 | 5.00 |
| 使い手 | 1 | 3.73 |
| 最果て | 1 | 4.40 |
| 補助 | 1 | 3.65 |
| メディア | 1 | 4.59 |
| ムカゴ | 1 | 6.18 |
| 走らせる | 1 | 4.16 |
| かっ飛ばす | 1 | 5.61 |
| 門衛 | 1 | 5.01 |
| 投げやり | 1 | 4.46 |
| 態度をとる | 1 | 4.95 |
| 尽くし | 1 | 3.64 |
| 適す | 1 | 4.33 |
| 汚す | 1 | 4.07 |
| 人生観 | 1 | 5.64 |
| 料 | 1 | 4.29 |
| 水汲み | 1 | 4.94 |
| 映え | 1 | 4.84 |
| 立場に立つ | 1 | 5.72 |
| 由 | 1 | 4.09 |
| 行動計画 | 1 | 5.94 |
| 貪欲 | 1 | 4.49 |
| グレー | 1 | 4.45 |
| 一考 | 1 | 4.90 |
| 見に行く | 1 | 4.31 |
| 叔父 | 1 | 3.88 |
| えっと | 1 | 3.16 |
| プンプン | 1 | 4.81 |
| 段差 | 1 | 4.63 |
| 行き着く | 1 | 4.28 |
| 魅せる | 1 | 4.48 |
| 連れ | 1 | 3.81 |
| 刻々 | 1 | 4.11 |
| 言い換える | 1 | 4.44 |
| 流される | 1 | 4.36 |
| 残暑 | 1 | 5.53 |
| け | 1 | 3.49 |
| 喝采 | 1 | 4.56 |
| 一ミリ | 1 | 5.06 |
| 腹心 | 1 | 4.43 |
| 掘りごたつ | 1 | 6.01 |
| 威武 | 1 | 5.71 |
| とどのつまり | 1 | 5.35 |
| 歓迎 | 1 | 3.56 |
| 一般論 | 1 | 5.10 |
| 致し方ない | 1 | 4.42 |
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