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 |
|---|---|---|
| 孕む | 4 | 4.21 |
| 財宝 | 4 | 4.20 |
| そっと | 4 | 3.14 |
| 立派 | 4 | 3.24 |
| 生命 | 4 | 3.56 |
| 落ち着いた | 4 | 3.49 |
| 謂れ | 4 | 3.88 |
| 体格 | 4 | 3.64 |
| この方 | 4 | 3.99 |
| 垓 | 4 | 3.39 |
| 再 | 4 | 3.76 |
| 言いわけ | 4 | 5.57 |
| ヒント | 4 | 4.04 |
| 槍 | 4 | 2.74 |
| 占める | 4 | 3.97 |
| 両目 | 4 | 4.25 |
| 見あげる | 4 | 5.64 |
| 屈強 | 4 | 4.12 |
| 敵対 | 4 | 3.58 |
| 押し倒し | 4 | 4.69 |
| 重ねる | 4 | 3.62 |
| 有り難うございました | 4 | 3.41 |
| 海中 | 4 | 4.02 |
| 毎に | 4 | 3.53 |
| 暖かい | 4 | 3.67 |
| 後回し | 4 | 3.95 |
| 何なのか | 4 | 3.86 |
| 果てる | 4 | 4.11 |
| もどかしい | 4 | 4.26 |
| ピンと | 4 | 3.97 |
| 思考 | 4 | 3.07 |
| 何もない | 4 | 3.46 |
| いい人 | 4 | 4.21 |
| 考え方 | 4 | 3.72 |
| お疲れ | 4 | 3.93 |
| 飛び立つ | 4 | 4.05 |
| 材料 | 4 | 3.36 |
| 扇状 | 4 | 5.01 |
| 初めから | 4 | 3.96 |
| せっせと | 4 | 4.37 |
| ため息 | 4 | 3.17 |
| 呼び出し | 4 | 3.79 |
| 吹っ切れる | 4 | 4.56 |
| 戦果 | 4 | 3.96 |
| 優に | 4 | 4.11 |
| トランクス | 4 | 5.26 |
| 埋蔵金 | 4 | 5.71 |
| 平たい | 4 | 4.60 |
| 息子 | 4 | 3.14 |
| かもしれん | 4 | 3.52 |
| 間違える | 4 | 3.64 |
| この中 | 4 | 3.83 |
| 指 | 4 | 2.96 |
| バラ | 4 | 3.96 |
| 誰か | 4 | 2.71 |
| 飛び降りる | 4 | 4.03 |
| 泥絵 | 4 | 4.31 |
| 小さめ | 4 | 4.41 |
| 知らせ | 4 | 3.68 |
| 参った | 4 | 4.01 |
| 下さる | 4 | 3.31 |
| 否が応でも | 4 | 5.02 |
| 閃く | 4 | 4.18 |
| 側から | 4 | 3.82 |
| 夢中 | 4 | 3.76 |
| 所へ | 4 | 3.57 |
| 光沢 | 4 | 4.32 |
| コツ | 4 | 4.11 |
| 血肉 | 4 | 4.41 |
| 窮地 | 4 | 4.04 |
| うろつく | 4 | 4.21 |
| お風呂 | 4 | 3.65 |
| 輝き | 4 | 3.35 |
| 両方 | 4 | 3.65 |
| 事務 | 4 | 4.39 |
| テリトリー | 4 | 4.70 |
| 決戦 | 4 | 3.75 |
| 瞬時 | 4 | 3.67 |
| 他ならない | 4 | 3.90 |
| 悪さ | 4 | 3.79 |
| からすると | 4 | 3.77 |
| 振り分け | 4 | 4.66 |
| 美味しそう | 4 | 3.73 |
| 白 | 4 | 3.00 |
| 髪の毛 | 4 | 3.78 |
| 贈る | 4 | 3.63 |
| うら若い | 4 | 4.99 |
| 逃走 | 4 | 3.94 |
| 点者 | 4 | 3.84 |
| 気分がいい | 4 | 4.84 |
| 練り上げる | 4 | 4.43 |
| 訝しい | 4 | 4.12 |
| ずぶ濡れ | 4 | 4.72 |
| そうする | 4 | 3.75 |
| 高速 | 4 | 3.51 |
| 掛け声 | 4 | 4.15 |
| 軍議 | 4 | 4.43 |
| 高める | 4 | 3.89 |
| すれ違う | 4 | 3.95 |
| 効率的 | 4 | 4.08 |
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