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 |
|---|---|---|
| 一進一退 | 1 | 4.86 |
| 身寄り | 1 | 4.86 |
| 適度 | 1 | 4.05 |
| 乗り捨てる | 1 | 5.60 |
| オドオド | 1 | 5.02 |
| 責任感 | 1 | 4.45 |
| わけが分からない | 1 | 5.34 |
| 不在 | 1 | 3.86 |
| 庭付き | 1 | 5.62 |
| 非現実的 | 1 | 4.77 |
| 慰労 | 1 | 5.05 |
| 真鍮製 | 1 | 5.65 |
| 旗 | 1 | 3.80 |
| 学友 | 1 | 4.52 |
| のけ反る | 1 | 4.94 |
| 受け取り | 1 | 3.68 |
| 披露宴 | 1 | 4.62 |
| 攻防 | 1 | 3.93 |
| 無くちゃ | 1 | 4.97 |
| 熱中症 | 1 | 4.98 |
| 西部 | 1 | 4.15 |
| 音信不通 | 1 | 5.22 |
| 軍帽 | 1 | 5.10 |
| 積みなおす | 1 | 7.59 |
| 連れ | 1 | 3.81 |
| トイレ | 1 | 3.70 |
| 振り向ける | 1 | 5.14 |
| 舌打ち | 1 | 3.62 |
| ぎゅっと | 1 | 3.79 |
| 講義 | 1 | 3.77 |
| 必殺技 | 1 | 4.31 |
| 焦燥感 | 1 | 4.51 |
| 逃げ込む | 1 | 4.06 |
| 方がマシ | 1 | 4.36 |
| 下の毛 | 1 | 6.04 |
| 敗 | 1 | 4.89 |
| おーい | 1 | 4.00 |
| 皮切り | 1 | 4.53 |
| 最適 | 1 | 3.96 |
| 前例 | 1 | 4.29 |
| 味を調える | 1 | 5.80 |
| 住人 | 1 | 3.49 |
| 随分 | 1 | 3.06 |
| もの凄い | 1 | 4.29 |
| 女傑 | 1 | 4.74 |
| 三山 | 1 | 4.20 |
| べとつく | 1 | 5.99 |
| 郊外 | 1 | 4.29 |
| 以南 | 1 | 5.32 |
| 残念なこと | 1 | 5.06 |
| 暖房 | 1 | 4.78 |
| 八人 | 1 | 4.37 |
| 何度でも | 1 | 4.25 |
| 怒鳴りつける | 1 | 4.33 |
| ほー | 1 | 4.28 |
| 変わらぬ | 1 | 3.98 |
| ありがち | 1 | 4.52 |
| 置いてけぼり | 1 | 4.77 |
| 動機 | 1 | 4.23 |
| 再認識 | 1 | 4.63 |
| 思いをする | 1 | 4.62 |
| 愚 | 1 | 4.39 |
| 自己暗示 | 1 | 5.22 |
| 実地 | 1 | 4.83 |
| 忘れ物 | 1 | 4.51 |
| 向こう側 | 1 | 3.66 |
| 瓦解 | 1 | 4.38 |
| できるだけ早く | 1 | 4.83 |
| 取り合う | 1 | 4.12 |
| 馴れ初め | 1 | 4.98 |
| 夢のまた夢 | 1 | 4.95 |
| 目を丸くする | 1 | 4.22 |
| 一目散 | 1 | 5.95 |
| 彼女自身 | 1 | 4.08 |
| 陸橋 | 1 | 6.05 |
| パステル | 1 | 4.67 |
| 一桁 | 1 | 4.82 |
| 完膚なきまで | 1 | 4.58 |
| 脱兎のごとく | 1 | 5.04 |
| んん | 1 | 3.70 |
| 野生動物 | 1 | 4.49 |
| 方向転換 | 1 | 4.44 |
| 牛 | 1 | 3.67 |
| 体育 | 1 | 4.42 |
| 補佐 | 1 | 3.71 |
| 持続 | 1 | 4.53 |
| 上陸 | 1 | 4.19 |
| 軽はずみ | 1 | 5.01 |
| 問題点 | 1 | 4.29 |
| バケツ | 1 | 4.43 |
| ノースリーブ | 1 | 5.22 |
| 気負い | 1 | 4.60 |
| 十一 | 1 | 4.01 |
| 篤と | 1 | 4.82 |
| メディア | 1 | 4.59 |
| 実 | 1 | 3.37 |
| 軽々しい | 1 | 4.45 |
| 走り続ける | 1 | 4.72 |
| 同情 | 1 | 3.64 |
| いくら何でも | 1 | 3.85 |
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