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 |
|---|---|---|
| 東西 | 1 | 4.31 |
| 撓める | 1 | 5.18 |
| 主導権 | 1 | 4.31 |
| 浮き上がる | 1 | 4.22 |
| 尽きない | 1 | 4.53 |
| 競い合う | 1 | 4.51 |
| 出端 | 1 | 4.63 |
| 書状 | 1 | 4.13 |
| 恒例行事 | 1 | 5.13 |
| 勝負どころ | 1 | 5.49 |
| にゃ | 1 | 3.21 |
| ラウンド | 1 | 4.55 |
| 吹きすさぶ | 1 | 5.09 |
| 本体 | 1 | 3.63 |
| 入れ食い | 1 | 5.47 |
| 行ってらっしゃい | 1 | 4.27 |
| 二頭立て | 1 | 5.34 |
| 険しい山 | 1 | 5.43 |
| 実によく | 1 | 5.29 |
| そっぽを向く | 1 | 4.68 |
| 潮流 | 1 | 5.12 |
| かなぐり捨てる | 1 | 4.89 |
| 思い浮かべる | 1 | 3.73 |
| 同期生 | 1 | 5.60 |
| ハイジャンプ | 1 | 5.88 |
| 主な | 1 | 3.97 |
| 準 | 1 | 3.95 |
| 間抜け | 1 | 3.88 |
| 棒 | 1 | 3.51 |
| 赤子の手をひねる | 1 | 5.62 |
| 晴れやかな笑顔 | 1 | 5.23 |
| 二十七 | 1 | 4.91 |
| 何があっても | 1 | 4.21 |
| 売り上げ | 1 | 4.24 |
| 勇者 | 1 | 2.61 |
| 逆行 | 1 | 5.05 |
| 推定 | 1 | 4.42 |
| 強靭 | 1 | 4.05 |
| 戯れる | 1 | 4.58 |
| 妊娠中 | 1 | 4.97 |
| 実験 | 1 | 3.40 |
| 公 | 1 | 3.28 |
| 戦列 | 1 | 4.45 |
| 揉める | 1 | 4.27 |
| レンガ | 1 | 4.32 |
| てな | 1 | 3.27 |
| 這いつくばる | 1 | 5.06 |
| 陰気くさい | 1 | 6.24 |
| 火傷 | 1 | 3.71 |
| 踏ん張り | 1 | 4.62 |
| 溜める | 1 | 4.32 |
| 平 | 1 | 4.03 |
| 大挙 | 1 | 4.82 |
| 節理 | 1 | 6.18 |
| 器械 | 1 | 5.72 |
| 行きすぎ | 1 | 5.53 |
| 必殺技 | 1 | 4.31 |
| 顔合わせ | 1 | 4.25 |
| 名字 | 1 | 4.50 |
| 途上 | 1 | 4.71 |
| 個人プレー | 1 | 6.36 |
| エントロピー | 1 | 5.69 |
| 年若い | 1 | 4.41 |
| 走馬灯 | 1 | 4.78 |
| なあに | 1 | 4.40 |
| 詰る | 1 | 4.64 |
| 一人用 | 1 | 5.09 |
| 在庫 | 1 | 4.13 |
| 巨大地震 | 1 | 6.28 |
| のたれ死ぬ | 1 | 6.11 |
| 共々 | 1 | 4.10 |
| 用具 | 1 | 4.95 |
| 網袋 | 1 | 6.39 |
| 親指 | 1 | 3.93 |
| こんだけ | 1 | 4.59 |
| 反し | 1 | 4.48 |
| 灯る | 1 | 4.09 |
| 徒労に終わる | 1 | 5.52 |
| 均衡 | 1 | 4.25 |
| 刻々 | 1 | 4.11 |
| 描写 | 1 | 4.16 |
| メディア | 1 | 4.59 |
| 不確実 | 1 | 5.44 |
| お決まり | 1 | 4.60 |
| 棘 | 1 | 3.98 |
| 電力 | 1 | 4.83 |
| 憚る | 1 | 4.83 |
| 寄り道 | 1 | 4.38 |
| 戦意喪失 | 1 | 5.19 |
| 面倒をかける | 1 | 5.69 |
| 有数 | 1 | 4.41 |
| 会館 | 1 | 4.65 |
| 針金 | 1 | 4.81 |
| 施行 | 1 | 5.10 |
| 際立つ | 1 | 4.24 |
| 広め | 1 | 4.19 |
| だったろ | 1 | 4.89 |
| 坊主 | 1 | 3.96 |
| お側 | 1 | 4.55 |
| 何なり | 1 | 4.71 |
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