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 |
|---|---|---|
| 入れ替わる | 1 | 4.14 |
| 後部 | 1 | 4.51 |
| 対照的 | 1 | 3.99 |
| 多対多 | 1 | 5.09 |
| 幾重 | 1 | 5.02 |
| 万事休す | 1 | 5.20 |
| 七人 | 1 | 4.21 |
| ひとっ風呂 | 1 | 5.66 |
| 目のあたりにする | 1 | 6.39 |
| 事あるごとに | 1 | 4.57 |
| レンガ | 1 | 4.32 |
| 気にかける | 1 | 4.85 |
| 載せる | 1 | 3.79 |
| 生きもの | 1 | 5.44 |
| 路面 | 1 | 4.99 |
| 滅亡 | 1 | 4.14 |
| とびっ切り | 1 | 4.80 |
| 受け止める | 1 | 3.22 |
| 気の抜けた | 1 | 4.51 |
| 白塗り | 1 | 5.28 |
| 早足 | 1 | 4.34 |
| 特権階級 | 1 | 4.88 |
| 変心 | 1 | 5.62 |
| 山中 | 1 | 4.43 |
| 意味がない | 1 | 3.73 |
| 気持ちよい | 1 | 4.24 |
| 絶倫 | 1 | 5.63 |
| 投げやり | 1 | 4.46 |
| 記念 | 1 | 4.11 |
| 後述 | 1 | 5.37 |
| 乗り掛かった舟 | 1 | 6.69 |
| 尽くし | 1 | 3.64 |
| 祝杯 | 1 | 5.04 |
| 雑談 | 1 | 3.82 |
| 所信 | 1 | 5.94 |
| 振り向ける | 1 | 5.14 |
| 前向き | 1 | 4.08 |
| アラビア数字 | 1 | 5.55 |
| 憎い | 1 | 3.93 |
| 変調 | 1 | 5.05 |
| 久々 | 1 | 3.70 |
| 眼差し | 1 | 3.40 |
| 八月 | 1 | 4.62 |
| 身悶え | 1 | 4.79 |
| 場違い | 1 | 4.19 |
| 偽る | 1 | 4.21 |
| 取り組む | 1 | 4.14 |
| 力まかせ | 1 | 5.50 |
| 途方もない | 1 | 4.53 |
| しかねない | 1 | 4.19 |
| 風通し | 1 | 4.96 |
| 電波 | 1 | 4.40 |
| 足労 | 1 | 5.71 |
| 希少 | 1 | 3.97 |
| バネ | 1 | 4.58 |
| 筒井 | 1 | 4.46 |
| 涼 | 1 | 4.32 |
| 湫 | 1 | 4.57 |
| 突きいれる | 1 | 6.55 |
| 塩辛い | 1 | 5.07 |
| こと足りる | 1 | 5.92 |
| さらっと | 1 | 4.08 |
| 時つ | 1 | 5.65 |
| 丸投げ | 1 | 4.24 |
| 寄り道 | 1 | 4.38 |
| 朝一 | 1 | 4.76 |
| 見違える | 1 | 4.66 |
| 押し付け | 1 | 3.70 |
| ブリ | 1 | 4.77 |
| 風邪薬 | 1 | 5.30 |
| 建て場 | 1 | 5.18 |
| 驚くべき | 1 | 4.09 |
| 泣きじゃくる | 1 | 4.48 |
| せっつく | 1 | 4.86 |
| 西洋 | 1 | 4.50 |
| 万千 | 1 | 4.87 |
| 年より | 1 | 5.32 |
| 黄昏 | 1 | 3.93 |
| 高級車 | 1 | 5.40 |
| 絶やす | 1 | 4.46 |
| オッサン | 1 | 3.93 |
| 代官 | 1 | 4.11 |
| と言ったら嘘になる | 1 | 5.75 |
| 真っ暗 | 1 | 3.97 |
| 目する | 1 | 5.73 |
| には及ばない | 1 | 4.54 |
| 難を逃れる | 1 | 5.57 |
| 義勇軍 | 1 | 4.89 |
| 風景 | 1 | 3.68 |
| 責任を持って | 1 | 4.59 |
| 一人称 | 1 | 4.54 |
| 息をひそめる | 1 | 5.80 |
| 輸送 | 1 | 3.85 |
| 脅し | 1 | 3.90 |
| 一回り | 1 | 4.12 |
| 少な目 | 1 | 5.37 |
| ホコリ | 1 | 5.05 |
| 名に恥じない | 1 | 5.16 |
| 苦しさ | 1 | 4.70 |
| 泣き付く | 1 | 5.30 |
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