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 |
|---|---|---|
| 吉日 | 1 | 5.62 |
| 心底 | 1 | 3.64 |
| 攻撃的 | 1 | 4.32 |
| 五度 | 1 | 5.03 |
| 聞き入れる | 1 | 4.27 |
| 幼 | 1 | 4.00 |
| 在庫 | 1 | 4.13 |
| グレー | 1 | 4.45 |
| 百八 | 1 | 4.78 |
| 金屏風 | 1 | 6.49 |
| 成果を上げる | 1 | 5.56 |
| 強請 | 1 | 4.85 |
| 鎌首をもたげる | 1 | 5.55 |
| キャラ | 1 | 3.48 |
| 伝 | 1 | 3.83 |
| キャッ | 1 | 4.92 |
| 実 | 1 | 3.37 |
| 痛み入る | 1 | 4.85 |
| カゴ | 1 | 4.26 |
| 湫 | 1 | 4.57 |
| 持てる | 1 | 3.58 |
| 二度三度 | 1 | 4.94 |
| 意気投合 | 1 | 4.64 |
| 近いうちに | 1 | 4.26 |
| 亡き者 | 1 | 4.86 |
| 安らぎ | 1 | 4.50 |
| 救いの手 | 1 | 4.73 |
| 泣きつく | 1 | 4.48 |
| 言い残す | 1 | 4.02 |
| 怖 | 1 | 3.84 |
| 清楚 | 1 | 4.33 |
| 思われる | 1 | 4.11 |
| スルー | 1 | 3.79 |
| 突っ込み | 1 | 3.83 |
| 娶る | 1 | 4.25 |
| ワンシーン | 1 | 5.07 |
| 一喜一憂 | 1 | 4.95 |
| 異次元 | 1 | 4.67 |
| 一進一退 | 1 | 4.86 |
| 流れる | 1 | 3.28 |
| 唐様 | 1 | 5.91 |
| 坊主 | 1 | 3.96 |
| この先 | 1 | 3.52 |
| 男らしい | 1 | 4.33 |
| 考 | 1 | 3.19 |
| ところ狭しと | 1 | 5.46 |
| 陰鬱 | 1 | 4.63 |
| 軒 | 1 | 4.27 |
| 巻く | 1 | 3.53 |
| エキサイト | 1 | 5.46 |
| 行けない | 1 | 4.06 |
| 平伏す | 1 | 4.59 |
| 破摧 | 1 | 5.05 |
| 体操 | 1 | 4.26 |
| 冬山 | 1 | 5.82 |
| 図々しい | 1 | 4.50 |
| 試験を受ける | 1 | 4.86 |
| ふんぞり返る | 1 | 4.49 |
| げ | 1 | 3.36 |
| 終わりまで | 1 | 5.11 |
| 修める | 1 | 4.38 |
| 封じる | 1 | 3.58 |
| 現役 | 1 | 4.17 |
| 眼差し | 1 | 3.40 |
| かみ殺す | 1 | 5.01 |
| 握り拳 | 1 | 4.71 |
| 回線 | 1 | 4.68 |
| 思わしい | 1 | 4.50 |
| 禁止 | 1 | 3.64 |
| 攻防 | 1 | 3.93 |
| 刈り払い | 1 | 6.75 |
| 某所 | 1 | 5.27 |
| 日曜 | 1 | 4.73 |
| お約束 | 1 | 4.07 |
| 悩ます | 1 | 4.50 |
| ストーリー | 1 | 4.13 |
| 挨拶まわり | 1 | 6.05 |
| 張り合う | 1 | 4.53 |
| 甚だ | 1 | 4.61 |
| わけが分からない | 1 | 5.34 |
| アルミ製 | 1 | 5.96 |
| 湖底 | 1 | 5.06 |
| 旗 | 1 | 3.80 |
| 壮大 | 1 | 4.45 |
| 名付ける | 1 | 4.30 |
| 杞憂 | 1 | 4.21 |
| 危機的 | 1 | 4.58 |
| 悪臭 | 1 | 4.44 |
| 合法 | 1 | 4.78 |
| 同期生 | 1 | 5.60 |
| 将来的 | 1 | 4.17 |
| 持続 | 1 | 4.53 |
| 引き絞る | 1 | 4.43 |
| 淡い | 1 | 3.61 |
| 伐つ | 1 | 4.82 |
| 張り出す | 1 | 4.68 |
| 駆けあがる | 1 | 5.85 |
| 荒れ野 | 1 | 4.07 |
| 小手調べ | 1 | 4.93 |
| 痙攣 | 1 | 4.08 |
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