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 |
|---|---|---|
| ふっと | 1 | 3.77 |
| 降下 | 1 | 4.04 |
| 不恰好 | 1 | 5.05 |
| 眩い | 1 | 4.16 |
| 派手 | 1 | 3.46 |
| 危険極まりない | 1 | 4.97 |
| ペア | 1 | 4.19 |
| 数知れない | 1 | 5.55 |
| 尽きない | 1 | 4.53 |
| お供 | 1 | 4.18 |
| 編む | 1 | 4.02 |
| より上 | 1 | 4.35 |
| 清め | 1 | 4.56 |
| おっとっと | 1 | 5.42 |
| 群れる | 1 | 4.73 |
| 空気が読めない | 1 | 5.21 |
| 斜め | 1 | 4.01 |
| 召集 | 1 | 4.63 |
| 転じて | 1 | 4.80 |
| 蛇 | 1 | 3.25 |
| 大手柄 | 1 | 5.28 |
| 問い詰める | 1 | 4.11 |
| 人らしい | 1 | 4.91 |
| 神聖視 | 1 | 5.21 |
| し易い | 1 | 3.94 |
| 今日のところは | 1 | 4.38 |
| 抱き上げる | 1 | 3.94 |
| 夕日 | 1 | 4.21 |
| 卒業生 | 1 | 4.49 |
| 消耗 | 1 | 3.58 |
| 一眠り | 1 | 5.07 |
| 弾く | 1 | 3.37 |
| 伸し | 1 | 5.28 |
| 塾 | 1 | 4.62 |
| 紛れ込む | 1 | 4.21 |
| 自作 | 1 | 4.34 |
| クラスメート | 1 | 4.37 |
| 驚かせる | 1 | 4.66 |
| 引っ立てる | 1 | 5.28 |
| 登場 | 1 | 3.44 |
| 芋虫 | 1 | 4.23 |
| 極致 | 1 | 4.88 |
| 小規模 | 1 | 4.15 |
| ふふふ | 1 | 3.50 |
| 行方不明者 | 1 | 4.83 |
| お近づき | 1 | 4.90 |
| 知名度 | 1 | 4.50 |
| 三角柱 | 1 | 6.40 |
| 洗い物 | 1 | 4.73 |
| いい思いをする | 1 | 6.78 |
| ビリビリ | 1 | 4.51 |
| 陸 | 1 | 3.77 |
| 純度 | 1 | 4.52 |
| 報いる | 1 | 4.30 |
| 掃除 | 1 | 3.48 |
| キャッキャ | 1 | 5.01 |
| 素っぴん | 1 | 5.31 |
| 甲冑 | 1 | 3.70 |
| いっそ | 1 | 3.65 |
| 天空 | 1 | 3.91 |
| ってことは | 1 | 3.48 |
| う歯 | 1 | 4.60 |
| 不甲斐ない | 1 | 4.24 |
| エキサイト | 1 | 5.46 |
| 立ち居振る舞い | 1 | 4.66 |
| ティアラ | 1 | 3.80 |
| ブナ | 1 | 5.36 |
| こっちの話 | 1 | 4.86 |
| 照れる | 1 | 3.93 |
| 初桜 | 1 | 7.59 |
| 飯ごう | 1 | 6.24 |
| 虚しく | 1 | 4.33 |
| 猛スピード | 1 | 4.74 |
| けれん味 | 1 | 6.99 |
| 居ても立っても居られない | 1 | 5.92 |
| 冷んやり | 1 | 4.32 |
| 針のムシロ | 1 | 6.36 |
| 一ミリ | 1 | 5.06 |
| 一分 | 1 | 4.13 |
| 飛び越える | 1 | 4.05 |
| 匂う | 1 | 4.92 |
| 刃こぼれ | 1 | 4.81 |
| 要する | 1 | 4.30 |
| あい | 1 | 3.89 |
| 自己陶酔 | 1 | 5.61 |
| 至る所 | 1 | 4.49 |
| 突撃 | 1 | 3.31 |
| 体制 | 1 | 3.81 |
| 主催 | 1 | 4.18 |
| ロス | 1 | 4.01 |
| おっかなびっくり | 1 | 4.70 |
| 選ばれし者 | 1 | 5.24 |
| クセ | 1 | 4.64 |
| 今か今か | 1 | 4.62 |
| 風船 | 1 | 4.51 |
| 新興国 | 1 | 5.43 |
| がけ崩れ | 1 | 6.18 |
| 仕返し | 1 | 4.33 |
| マナー違反 | 1 | 4.82 |
| 台頭 | 1 | 4.80 |
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