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 |
|---|---|---|
| 持ち込む | 7 | 3.57 |
| 無謀 | 7 | 3.84 |
| と言うと | 7 | 3.52 |
| 一回 | 7 | 3.50 |
| 昼 | 7 | 3.52 |
| 活気 | 7 | 4.09 |
| 逃がす | 7 | 3.52 |
| ひたすら | 7 | 3.47 |
| 飛び出す | 7 | 3.50 |
| 疲労 | 7 | 3.56 |
| 駆る | 7 | 3.85 |
| 上流 | 7 | 4.42 |
| 生 | 7 | 3.40 |
| 隠す | 7 | 3.08 |
| いける | 7 | 3.19 |
| 次々 | 7 | 3.28 |
| 早馬 | 7 | 4.51 |
| 権 | 7 | 3.90 |
| 口を開く | 7 | 3.33 |
| その通り | 7 | 3.27 |
| 受験勉強 | 7 | 5.15 |
| 変更 | 7 | 3.44 |
| どうしたん | 7 | 3.53 |
| そ | 7 | 2.90 |
| 草 | 7 | 3.40 |
| ヒドイ | 7 | 5.09 |
| 向く | 7 | 3.30 |
| 六人 | 7 | 3.94 |
| 覆い | 7 | 3.78 |
| お願いします | 7 | 3.20 |
| 頑丈 | 7 | 3.66 |
| 人員 | 7 | 3.65 |
| 大人数 | 7 | 4.27 |
| 造り | 7 | 3.84 |
| 存分に | 7 | 3.83 |
| 子なし | 7 | 3.78 |
| 十二 | 7 | 3.73 |
| 牙 | 7 | 3.22 |
| もう一回 | 7 | 4.10 |
| 付き | 7 | 3.15 |
| シャツ | 7 | 3.89 |
| へぇー | 7 | 4.66 |
| 車体 | 7 | 4.49 |
| あれ程 | 7 | 3.73 |
| 熱 | 7 | 3.20 |
| タイプ | 7 | 3.22 |
| 吹き飛ぶ | 7 | 3.58 |
| 刺す | 7 | 3.50 |
| 数日 | 7 | 3.33 |
| 活躍 | 7 | 3.42 |
| 秋 | 7 | 3.57 |
| 羽 | 7 | 3.24 |
| 勿体ない | 7 | 3.70 |
| 鎧 | 7 | 2.87 |
| 是非とも | 7 | 3.92 |
| いざ | 7 | 3.58 |
| 接する | 7 | 3.89 |
| 向い | 7 | 3.44 |
| 勝利 | 7 | 2.88 |
| 供に | 7 | 3.75 |
| 質 | 7 | 3.62 |
| 貯蔵 | 7 | 4.53 |
| 梃 | 7 | 3.64 |
| 人生 | 7 | 3.17 |
| マズい | 7 | 4.31 |
| 左右 | 7 | 3.23 |
| 八 | 7 | 3.40 |
| 濃度 | 7 | 4.22 |
| 飛ばし | 7 | 3.48 |
| 心地よい | 7 | 3.92 |
| やる気 | 7 | 3.51 |
| やがて | 7 | 3.09 |
| 進言 | 7 | 4.10 |
| 試す | 7 | 3.51 |
| 増強 | 7 | 4.13 |
| こうやって | 7 | 3.68 |
| 積極的 | 7 | 3.62 |
| ラジオ | 7 | 4.64 |
| 別れ | 7 | 3.44 |
| 真面目 | 7 | 3.25 |
| 分ける | 7 | 3.85 |
| 祖父 | 7 | 3.41 |
| 何せ | 7 | 3.29 |
| 俺的 | 7 | 4.74 |
| やらかす | 7 | 3.74 |
| そうもない | 7 | 4.27 |
| 引きつける | 7 | 4.71 |
| 夢 | 7 | 2.91 |
| 育つ | 7 | 3.40 |
| リムジン | 7 | 5.29 |
| 動かす | 7 | 2.95 |
| キラキラ | 7 | 3.63 |
| 化粧品 | 7 | 4.71 |
| 知れる | 7 | 3.41 |
| おはよう | 7 | 3.57 |
| スーツ | 7 | 3.95 |
| バカ | 7 | 3.23 |
| 反撃 | 7 | 3.52 |
| 到る処 | 7 | 4.65 |
| 若さ | 7 | 4.16 |
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