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 |
|---|---|---|
| 観念 | 1 | 4.18 |
| 入学 | 1 | 3.63 |
| 手当たり次第 | 1 | 4.89 |
| 愚 | 1 | 4.39 |
| 放題 | 1 | 4.29 |
| 又ない | 1 | 5.95 |
| 身ごもる | 1 | 5.12 |
| 言い出す | 1 | 3.62 |
| わっ | 1 | 3.63 |
| 買い取り | 1 | 4.30 |
| 埋め合わせ | 1 | 4.88 |
| ムキになる | 1 | 4.69 |
| 真摯 | 1 | 4.13 |
| そうこうしている内に | 1 | 4.33 |
| 真っ青 | 1 | 3.96 |
| うとうと | 1 | 4.62 |
| 兄夫婦 | 1 | 5.46 |
| 座りこむ | 1 | 4.86 |
| 掠る | 1 | 4.53 |
| 九割 | 1 | 4.61 |
| 二国間 | 1 | 5.52 |
| 死人 | 1 | 3.99 |
| ドラマ | 1 | 4.41 |
| 品物 | 1 | 4.07 |
| 企む | 1 | 3.95 |
| そうなんです | 1 | 3.96 |
| 科学者 | 1 | 4.65 |
| 急接近 | 1 | 4.87 |
| 見知らぬ | 1 | 3.93 |
| 小銭 | 1 | 4.62 |
| ニュアンス | 1 | 4.46 |
| 就寝時間 | 1 | 5.46 |
| 大隊長 | 1 | 4.01 |
| 言及 | 1 | 4.20 |
| 夏場 | 1 | 4.81 |
| か国 | 1 | 5.08 |
| 爆撃 | 1 | 4.16 |
| 法則 | 1 | 4.13 |
| フル装備 | 1 | 5.09 |
| 乖離 | 1 | 4.74 |
| 年明け | 1 | 4.78 |
| 羽子 | 1 | 3.71 |
| 言いようがない | 1 | 4.27 |
| 任 | 1 | 4.16 |
| 固唾をのむ | 1 | 6.45 |
| 野牡丹 | 1 | 4.45 |
| 式を挙げる | 1 | 5.40 |
| 静まりかえる | 1 | 4.70 |
| 自尊心 | 1 | 4.48 |
| また借り | 1 | 5.23 |
| 和紙 | 1 | 5.10 |
| 優しい声 | 1 | 4.51 |
| 未練がましい | 1 | 4.98 |
| 血の滲むよう | 1 | 5.40 |
| 邪 | 1 | 3.68 |
| 照りつける | 1 | 5.03 |
| 風邪をひく | 1 | 5.42 |
| 手の甲 | 1 | 4.14 |
| サイコー | 1 | 5.30 |
| 前衛 | 1 | 3.59 |
| 前人未到 | 1 | 5.33 |
| 目のあたりにする | 1 | 6.39 |
| 清廉 | 1 | 4.66 |
| 吠える | 1 | 3.84 |
| 囚人 | 1 | 4.54 |
| 生きとし生ける物 | 1 | 6.42 |
| ゴミ屑 | 1 | 5.54 |
| 二通り | 1 | 5.28 |
| 地球 | 1 | 3.28 |
| 念入り | 1 | 4.29 |
| 要職 | 1 | 4.72 |
| 離反 | 1 | 4.62 |
| また明日 | 1 | 4.25 |
| 聖なる | 1 | 4.10 |
| もうた | 1 | 5.29 |
| 伏す | 1 | 4.60 |
| ピラミッド | 1 | 4.75 |
| 称える | 1 | 4.46 |
| 作戦命令 | 1 | 6.16 |
| 対策を講じる | 1 | 5.54 |
| 立ち去る | 1 | 3.70 |
| 修学旅行 | 1 | 4.46 |
| コノヤロー | 1 | 5.52 |
| オールバック | 1 | 4.72 |
| お側 | 1 | 4.55 |
| 何ともない | 1 | 4.45 |
| 四天王 | 1 | 4.23 |
| たらふく | 1 | 4.91 |
| 高三 | 1 | 5.96 |
| 予断を許さない | 1 | 5.41 |
| マヒ | 1 | 5.13 |
| 兵装 | 1 | 4.23 |
| 息巻く | 1 | 4.64 |
| 航空自衛隊 | 1 | 5.87 |
| 科学的 | 1 | 4.82 |
| どうかな | 1 | 4.03 |
| 全容 | 1 | 4.51 |
| 宙に浮く | 1 | 4.88 |
| 原生林 | 1 | 5.32 |
| 如何わしい | 1 | 4.75 |
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