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 |
|---|---|---|
| 残す | 35 | 2.85 |
| そこ | 35 | 2.66 |
| まあ | 35 | 2.23 |
| 別に | 34 | 2.69 |
| 山犬 | 34 | 5.36 |
| 仮令 | 34 | 3.27 |
| かつて | 34 | 3.09 |
| 都 | 34 | 3.29 |
| 上げ | 34 | 2.67 |
| 神話 | 34 | 3.86 |
| 瞬間 | 34 | 2.61 |
| 金属 | 34 | 3.33 |
| 訓練 | 34 | 2.89 |
| 得る | 34 | 2.82 |
| 教え | 34 | 2.64 |
| 就いて | 34 | 3.02 |
| 宿屋 | 34 | 3.54 |
| 夜 | 34 | 2.74 |
| だって | 34 | 2.30 |
| 歩き | 34 | 3.21 |
| ちゃんと | 34 | 2.69 |
| みたいな | 34 | 2.70 |
| はっ | 34 | 2.79 |
| での | 34 | 2.60 |
| センチ | 33 | 3.67 |
| 将に | 33 | 3.16 |
| 飛び込む | 33 | 3.31 |
| 漁村 | 33 | 4.80 |
| 何故 | 33 | 2.62 |
| 的 | 33 | 2.51 |
| 西 | 33 | 3.22 |
| 早く | 33 | 2.72 |
| と言うのは | 33 | 2.57 |
| 長い | 33 | 2.68 |
| 程に | 33 | 3.01 |
| 肉 | 33 | 2.78 |
| あ | 33 | 2.22 |
| 総出 | 33 | 2.91 |
| 左 | 33 | 3.28 |
| 気持ち | 33 | 2.61 |
| 刺身 | 33 | 4.47 |
| 先に | 33 | 2.69 |
| 状態 | 33 | 2.57 |
| そろそろ | 33 | 2.88 |
| 阿 | 32 | 4.20 |
| んじゃ | 32 | 2.56 |
| 出発 | 32 | 3.26 |
| 五百 | 32 | 3.83 |
| 色 | 32 | 2.73 |
| 連れて | 32 | 2.86 |
| 現れる | 32 | 2.76 |
| 腰 | 32 | 2.88 |
| そう言えば | 32 | 2.80 |
| 通り | 32 | 2.74 |
| 埋まる | 32 | 3.77 |
| 人間 | 32 | 2.21 |
| 任せ | 32 | 3.02 |
| そう言う | 32 | 2.36 |
| 食う | 32 | 3.13 |
| 受ける | 32 | 2.66 |
| 夕食 | 32 | 3.39 |
| 受け | 32 | 2.61 |
| 万 | 32 | 3.12 |
| 終わり | 31 | 3.06 |
| 風呂 | 31 | 3.43 |
| 引く | 31 | 2.90 |
| 横に | 31 | 3.00 |
| 注意 | 31 | 3.10 |
| 戦線 | 31 | 3.91 |
| 掘り出す | 31 | 4.64 |
| ずい分 | 31 | 3.33 |
| 班 | 31 | 3.63 |
| 透り | 31 | 3.70 |
| 云う | 31 | 2.77 |
| 年 | 31 | 2.64 |
| 腕時計 | 31 | 4.56 |
| 近い | 31 | 2.79 |
| 荷馬車 | 31 | 4.02 |
| ながらも | 31 | 2.88 |
| 強化 | 31 | 2.90 |
| ダメ | 31 | 2.93 |
| 限り | 31 | 2.90 |
| 深い | 31 | 3.16 |
| 潜る | 31 | 3.41 |
| 石 | 31 | 2.85 |
| 確実 | 31 | 3.06 |
| 進む | 31 | 2.84 |
| わね | 31 | 2.77 |
| そうです | 31 | 2.73 |
| 古川 | 31 | 5.95 |
| 楽しい | 31 | 2.76 |
| 若い | 31 | 3.13 |
| 立つ | 30 | 2.58 |
| によって | 30 | 2.54 |
| 止め | 30 | 2.78 |
| これだけ | 30 | 3.14 |
| よな | 30 | 2.69 |
| 近く | 30 | 2.69 |
| 呉れ手 | 30 | 2.75 |
| 形 | 30 | 2.70 |
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