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 |
|---|---|---|
| 思わしい | 1 | 4.50 |
| 草陰 | 1 | 5.49 |
| どっぷり | 1 | 4.98 |
| トントン拍子 | 1 | 5.26 |
| 雑貨店 | 1 | 5.08 |
| 傍若無人 | 1 | 4.71 |
| 取り留めもない | 1 | 5.28 |
| 縦割り | 1 | 5.88 |
| としちゃ | 1 | 4.97 |
| ずる賢い | 1 | 5.55 |
| こぼれ落ちる | 1 | 4.44 |
| マジウケる | 1 | 6.18 |
| 押し上げ | 1 | 4.59 |
| 主目的 | 1 | 4.91 |
| 相変らず | 1 | 4.59 |
| その他もろもろ | 1 | 5.13 |
| 美事 | 1 | 5.10 |
| 蛇 | 1 | 3.25 |
| 登場 | 1 | 3.44 |
| 買いたたく | 1 | 5.62 |
| フォルム | 1 | 4.64 |
| ハッタリ | 1 | 4.60 |
| 深手 | 1 | 4.65 |
| から振り | 1 | 4.77 |
| 計画的 | 1 | 4.81 |
| なんす | 1 | 4.63 |
| つとめて | 1 | 5.01 |
| 渡船 | 1 | 5.34 |
| 装着 | 1 | 3.89 |
| 感覚的 | 1 | 4.37 |
| 安堵感 | 1 | 4.94 |
| なあに | 1 | 4.40 |
| 純和風 | 1 | 5.54 |
| 丸くなって | 1 | 4.65 |
| 出撃 | 1 | 4.08 |
| 一日の長 | 1 | 5.30 |
| 兄貴分 | 1 | 4.93 |
| 漆塗り | 1 | 5.54 |
| 棚上げ | 1 | 4.75 |
| ダントツ | 1 | 5.10 |
| 殊勝 | 1 | 4.50 |
| 建て場 | 1 | 5.18 |
| 何とも言えない | 1 | 4.01 |
| 美少年 | 1 | 4.35 |
| 島 | 1 | 3.06 |
| 中一 | 1 | 5.06 |
| せえ | 1 | 4.65 |
| 妊娠中 | 1 | 4.97 |
| ほど遠い | 1 | 4.75 |
| 押しつける | 1 | 4.40 |
| 建設 | 1 | 3.96 |
| 保護 | 1 | 3.52 |
| 仕舞い | 1 | 4.41 |
| 注ぎ込む | 1 | 4.06 |
| 空を飛ぶ | 1 | 3.96 |
| 不釣合 | 1 | 5.41 |
| 盆 | 1 | 4.58 |
| ドラマ | 1 | 4.41 |
| 純度 | 1 | 4.52 |
| 凹凸 | 1 | 4.62 |
| 均衡 | 1 | 4.25 |
| 保持 | 1 | 4.11 |
| 曇る | 1 | 4.17 |
| 脂 | 1 | 4.15 |
| 何ともない | 1 | 4.45 |
| みそ | 1 | 5.42 |
| コウ | 1 | 4.20 |
| 自業自得 | 1 | 4.03 |
| 分布図 | 1 | 5.73 |
| チリ | 1 | 4.82 |
| 亡き人 | 1 | 6.14 |
| 的外れ | 1 | 4.57 |
| 傍 | 1 | 3.23 |
| 防壁 | 1 | 3.77 |
| 切ない | 1 | 4.07 |
| 戯れる | 1 | 4.58 |
| 隅に置けない | 1 | 5.77 |
| 同伴者 | 1 | 5.31 |
| 習い | 1 | 4.30 |
| 四月 | 1 | 4.42 |
| 前置き | 1 | 4.13 |
| 切り出し | 1 | 4.47 |
| 不才 | 1 | 4.98 |
| 鋼製 | 1 | 5.23 |
| 騒がしい | 1 | 3.67 |
| 良し | 1 | 3.85 |
| 大仕事 | 1 | 4.71 |
| 片づける | 1 | 4.48 |
| デジャヴ | 1 | 5.23 |
| 立候補 | 1 | 4.46 |
| 容貌 | 1 | 4.22 |
| 男らしい | 1 | 4.33 |
| 顔を合わす | 1 | 5.41 |
| 梨 | 1 | 3.33 |
| 当てられる | 1 | 4.62 |
| 字面 | 1 | 4.88 |
| 計り | 1 | 4.59 |
| ただいま帰りました | 1 | 5.24 |
| どっしり | 1 | 4.57 |
| 人垣 | 1 | 4.47 |
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