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 |
|---|---|---|
| クール | 1 | 4.16 |
| 焠す | 1 | 5.50 |
| 下旬 | 1 | 5.02 |
| 挑戦 | 1 | 3.70 |
| 血まみれ | 1 | 4.40 |
| 小ぶり | 1 | 4.63 |
| 精通 | 1 | 4.49 |
| 割とどうでもいい | 1 | 5.45 |
| ぼさぼさ | 1 | 4.79 |
| 時間を取られる | 1 | 5.34 |
| 比較にならない | 1 | 4.39 |
| 外敵 | 1 | 4.41 |
| 顕現 | 1 | 4.03 |
| 難を逃れる | 1 | 5.57 |
| 下賤 | 1 | 4.75 |
| ピッタリ | 1 | 4.30 |
| 雇い | 1 | 4.66 |
| 描写 | 1 | 4.16 |
| 心情的 | 1 | 4.75 |
| 機嫌を直す | 1 | 5.59 |
| ロリ | 1 | 4.37 |
| 居場所 | 1 | 3.65 |
| 野原 | 1 | 4.71 |
| 立場に立つ | 1 | 5.72 |
| シンと | 1 | 4.69 |
| 路面 | 1 | 4.99 |
| 末永く | 1 | 4.82 |
| ただでは | 1 | 4.39 |
| 口元 | 1 | 3.26 |
| 厳 | 1 | 4.50 |
| 中心地 | 1 | 4.62 |
| 有事 | 1 | 4.24 |
| 四割 | 1 | 4.87 |
| 痛める | 1 | 4.14 |
| 敏感 | 1 | 4.01 |
| 手立て | 1 | 4.41 |
| 性分 | 1 | 4.50 |
| 重低音 | 1 | 4.88 |
| フォーマルドレス | 1 | 6.89 |
| 余計なお世話 | 1 | 4.58 |
| 抉る | 1 | 3.74 |
| 急造 | 1 | 4.85 |
| 心のよりどころ | 1 | 6.03 |
| 内情 | 1 | 4.36 |
| 自尊心 | 1 | 4.48 |
| 風の音 | 1 | 4.56 |
| 寺 | 1 | 4.14 |
| 一大 | 1 | 4.41 |
| 幾世 | 1 | 4.37 |
| 疑問点 | 1 | 4.99 |
| 課題 | 1 | 3.83 |
| トントン拍子 | 1 | 5.26 |
| 体現 | 1 | 4.30 |
| 呻り | 1 | 4.91 |
| 性能 | 1 | 3.48 |
| 野牡丹 | 1 | 4.45 |
| 兄さん | 1 | 3.38 |
| 取っかえ引っかえ | 1 | 5.65 |
| シャープ | 1 | 4.81 |
| 目論見 | 1 | 4.21 |
| 事あるごとに | 1 | 4.57 |
| 露出狂 | 1 | 5.18 |
| 平米 | 1 | 6.31 |
| イマジネーション | 1 | 5.77 |
| 今宵 | 1 | 4.40 |
| やんごとない | 1 | 4.95 |
| デフォルト | 1 | 4.66 |
| 後述 | 1 | 5.37 |
| 不必要 | 1 | 4.63 |
| 九十 | 1 | 4.33 |
| 置いてけぼり | 1 | 4.77 |
| 苦笑 | 1 | 3.03 |
| さい | 1 | 4.47 |
| 戦争 | 1 | 3.00 |
| 若者 | 1 | 3.63 |
| ハッピー | 1 | 4.77 |
| 終息 | 1 | 4.77 |
| 全力疾走 | 1 | 4.43 |
| 小ばか | 1 | 5.69 |
| 四度 | 1 | 4.92 |
| 嘘のよう | 1 | 4.20 |
| 並記 | 1 | 5.17 |
| 投げ飛ばす | 1 | 4.36 |
| 一夫多妻 | 1 | 5.04 |
| 渋面 | 1 | 4.55 |
| めっきり | 1 | 4.91 |
| 猛獣 | 1 | 4.33 |
| 貪欲 | 1 | 4.49 |
| オッサン | 1 | 3.93 |
| 清楚 | 1 | 4.33 |
| 無理がきく | 1 | 6.69 |
| 出入り口 | 1 | 4.00 |
| 道を切り開く | 1 | 5.19 |
| 白々しい | 1 | 4.50 |
| 二国間 | 1 | 5.52 |
| 圏 | 1 | 4.33 |
| フレンドリー | 1 | 4.75 |
| 横から | 1 | 3.75 |
| 生きもの | 1 | 5.44 |
| タナ | 1 | 4.50 |
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