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 |
|---|---|---|
| 情報端末 | 1 | 5.70 |
| 一心 | 1 | 4.63 |
| 恥を忍ぶ | 1 | 6.99 |
| 変に | 1 | 3.93 |
| 都合上 | 1 | 4.78 |
| 跡継ぎ | 1 | 4.24 |
| 延ばす | 1 | 4.50 |
| 報 | 1 | 4.44 |
| ってのは | 1 | 3.25 |
| 中心地 | 1 | 4.62 |
| シソ | 1 | 5.73 |
| ぐつぐつ | 1 | 5.13 |
| 良くやった | 1 | 4.11 |
| 要約すれば | 1 | 5.31 |
| 寝そべる | 1 | 4.31 |
| 品定め | 1 | 4.74 |
| 同僚 | 1 | 3.84 |
| 吊し | 1 | 5.29 |
| ヤケ | 1 | 5.64 |
| 老体 | 1 | 4.82 |
| 行方不明者 | 1 | 4.83 |
| 山菜採り | 1 | 5.71 |
| 威武 | 1 | 5.71 |
| ギリギリまで | 1 | 4.33 |
| 山裾 | 1 | 5.18 |
| 固さ | 1 | 4.88 |
| ベクトル | 1 | 4.77 |
| 何れにしても | 1 | 4.36 |
| 心の拠り所 | 1 | 5.16 |
| 見誤る | 1 | 5.19 |
| 大切な人 | 1 | 4.14 |
| 運転席 | 1 | 4.67 |
| いいね | 1 | 3.98 |
| 怒涛 | 1 | 4.45 |
| 包囲網 | 1 | 4.38 |
| 斜面 | 1 | 4.22 |
| 手が早い | 1 | 5.39 |
| 熱中 | 1 | 4.47 |
| 進行方向 | 1 | 4.29 |
| 埋め合わせ | 1 | 4.88 |
| 心底 | 1 | 3.64 |
| 生み出す | 1 | 3.25 |
| 今古 | 1 | 5.97 |
| 莫大 | 1 | 3.88 |
| みっちり | 1 | 4.62 |
| 空手 | 1 | 4.77 |
| 見合 | 1 | 6.02 |
| 立ち入り禁止区域 | 1 | 5.62 |
| 争う | 1 | 3.75 |
| 台詞回し | 1 | 5.88 |
| もろに | 1 | 4.74 |
| 心酔 | 1 | 4.61 |
| 飛び切り | 1 | 4.55 |
| 林 | 1 | 3.72 |
| 雲行き | 1 | 5.01 |
| 死にかける | 1 | 4.10 |
| 遊撃隊 | 1 | 4.60 |
| 杓 | 1 | 5.73 |
| 岩礁 | 1 | 5.05 |
| 一辺 | 1 | 5.00 |
| 歩きはじめ | 1 | 6.19 |
| 憂鬱 | 1 | 4.20 |
| 雇われ | 1 | 4.26 |
| 水汲み | 1 | 4.94 |
| 瞑想 | 1 | 4.31 |
| 無情 | 1 | 4.45 |
| ひそひそ | 1 | 4.50 |
| タンク | 1 | 4.22 |
| 代わる | 1 | 3.81 |
| 平和 | 1 | 3.39 |
| 止まり | 1 | 3.89 |
| 今後とも | 1 | 4.40 |
| 点頭く | 1 | 3.86 |
| 事もなげに | 1 | 4.78 |
| 囀る | 1 | 4.98 |
| 総指揮官 | 1 | 4.99 |
| シンと | 1 | 4.69 |
| 優男 | 1 | 4.47 |
| 給え | 1 | 4.07 |
| 石の上にも三年 | 1 | 6.94 |
| 金屏風 | 1 | 6.49 |
| 時空 | 1 | 3.47 |
| ウヨウヨ | 1 | 5.60 |
| 腹の虫が鳴く | 1 | 6.29 |
| 鄙 | 1 | 4.43 |
| 血のり | 1 | 5.92 |
| 臭う | 1 | 4.69 |
| 排気量 | 1 | 6.24 |
| 背筋 | 1 | 3.62 |
| が早いか | 1 | 4.51 |
| かじ取り | 1 | 5.91 |
| すい星 | 1 | 6.07 |
| のそり | 1 | 4.89 |
| 気に病む | 1 | 4.75 |
| 脱線 | 1 | 4.48 |
| 天蛾 | 1 | 5.63 |
| 積みなおす | 1 | 7.59 |
| 南半 | 1 | 6.99 |
| 肉薄 | 1 | 4.24 |
| バツ印 | 1 | 5.43 |
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