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 |
|---|---|---|
| お爺さん | 2 | 3.96 |
| 数時間 | 2 | 3.86 |
| 殺気立つ | 2 | 4.59 |
| せねば | 2 | 3.95 |
| 横たえる | 2 | 4.43 |
| スレ | 2 | 4.11 |
| 志 | 2 | 3.66 |
| 数え | 2 | 3.89 |
| 琥珀 | 2 | 4.06 |
| 繰り広げる | 2 | 3.72 |
| 行く行く | 2 | 4.64 |
| 空で | 2 | 4.50 |
| お茶目 | 2 | 4.80 |
| 概要 | 2 | 4.30 |
| 聞き及ぶ | 2 | 4.28 |
| 醍醐味 | 2 | 4.77 |
| 身につける | 2 | 4.51 |
| 隔離 | 2 | 4.14 |
| 切り替える | 2 | 3.89 |
| 伝言 | 2 | 3.97 |
| 不安顔 | 2 | 5.99 |
| 執拗 | 2 | 4.31 |
| 下地 | 2 | 4.59 |
| 歩き続ける | 2 | 4.70 |
| 色気 | 2 | 4.06 |
| 希薄 | 2 | 4.50 |
| カギ | 2 | 4.67 |
| 気づかれ | 2 | 4.55 |
| ご一緒 | 2 | 4.17 |
| 迂闊 | 2 | 3.83 |
| 工事 | 2 | 3.88 |
| 増々 | 2 | 3.64 |
| 寄ってたかって | 2 | 5.02 |
| 水色 | 2 | 4.03 |
| 棚 | 2 | 3.74 |
| 白み | 2 | 4.94 |
| 破裂音 | 2 | 4.74 |
| 自然石 | 2 | 5.75 |
| 使い分け | 2 | 4.69 |
| 一合 | 2 | 4.98 |
| 心当たり | 2 | 3.87 |
| 願い | 2 | 3.38 |
| 指名 | 2 | 3.88 |
| 気はない | 2 | 3.75 |
| じゃった | 2 | 3.78 |
| 吊り | 2 | 4.40 |
| 手拭い | 2 | 4.79 |
| 逃げ帰る | 2 | 4.51 |
| 伯 | 2 | 3.49 |
| 厚遇 | 2 | 4.92 |
| 不用意 | 2 | 4.23 |
| 飛躍的 | 2 | 4.53 |
| 人の口 | 2 | 5.03 |
| 文字数 | 2 | 4.63 |
| 仕方のない | 2 | 3.98 |
| 俄かに | 2 | 4.12 |
| 忝い | 2 | 4.93 |
| パレード | 2 | 4.22 |
| 溜め込む | 2 | 4.23 |
| ほんの | 2 | 3.64 |
| 寄与 | 2 | 4.71 |
| 頼むから | 2 | 4.23 |
| 席取り | 2 | 6.09 |
| 売り | 2 | 3.82 |
| 感じとる | 2 | 4.78 |
| 迷わず | 2 | 4.19 |
| 失礼します | 2 | 3.77 |
| 生き神 | 2 | 6.27 |
| 折半 | 2 | 5.23 |
| 格下 | 2 | 4.37 |
| 増す | 2 | 3.62 |
| 大空 | 2 | 4.39 |
| ぬめる | 2 | 5.90 |
| 動作 | 2 | 3.43 |
| 年に一度 | 2 | 4.58 |
| 悲壮 | 2 | 4.58 |
| 視野 | 2 | 3.66 |
| 悔やむ | 2 | 4.20 |
| 室 | 2 | 3.39 |
| 事業 | 2 | 4.04 |
| 伯母ちゃん | 2 | 4.06 |
| 二神 | 2 | 4.37 |
| 金槌 | 2 | 4.80 |
| 人命 | 2 | 4.75 |
| 立ち | 2 | 3.49 |
| 鳴らす | 2 | 3.32 |
| 爽快 | 2 | 4.76 |
| とどめを刺す | 2 | 4.88 |
| 静か | 2 | 3.43 |
| 検分 | 2 | 4.46 |
| 簡潔 | 2 | 4.11 |
| 古めかしい | 2 | 4.81 |
| ならともかく | 2 | 3.89 |
| 男性 | 2 | 3.02 |
| 監督 | 2 | 3.94 |
| 角 | 2 | 3.15 |
| 境地 | 2 | 4.59 |
| 逃げ惑う | 2 | 4.41 |
| 跳ね返す | 2 | 4.42 |
| 発案 | 2 | 4.54 |
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