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 |
|---|---|---|
| 本州 | 1 | 5.65 |
| タジタジ | 1 | 5.32 |
| 入り込み | 1 | 4.61 |
| 応募 | 1 | 4.57 |
| 殺意 | 1 | 3.71 |
| 赤血球 | 1 | 5.90 |
| 豪快 | 1 | 3.96 |
| 釘 | 1 | 3.92 |
| 強請 | 1 | 4.85 |
| それどころではない | 1 | 4.54 |
| 楽々 | 1 | 4.77 |
| 磨き | 1 | 4.09 |
| 習い | 1 | 4.30 |
| 左目 | 1 | 4.30 |
| こすれ合う | 1 | 5.78 |
| 画房 | 1 | 5.79 |
| ハス | 1 | 4.63 |
| 進歩 | 1 | 4.29 |
| 責任を持って | 1 | 4.59 |
| 空っぽ | 1 | 4.20 |
| はーい | 1 | 3.77 |
| 生成 | 1 | 3.72 |
| 震えだす | 1 | 5.13 |
| かしこ | 1 | 5.14 |
| 本日 | 1 | 3.28 |
| 核爆発 | 1 | 5.71 |
| 悪うございました | 1 | 5.84 |
| 主だった | 1 | 4.41 |
| 社会情勢 | 1 | 5.77 |
| 保冷 | 1 | 4.62 |
| ブンブン | 1 | 4.41 |
| 礼儀 | 1 | 3.89 |
| 埒が明かない | 1 | 4.71 |
| 入学 | 1 | 3.63 |
| やっとの事で | 1 | 4.88 |
| 断念 | 1 | 4.45 |
| 犢鼻褌 | 1 | 4.77 |
| 包みこむ | 1 | 5.50 |
| よりか | 1 | 4.47 |
| 瞬発力 | 1 | 4.76 |
| 斬りつける | 1 | 4.65 |
| 視点 | 1 | 3.59 |
| 眠気 | 1 | 4.06 |
| 証しとして | 1 | 6.17 |
| 払いのける | 1 | 4.95 |
| ザックザック | 1 | 6.09 |
| 木こり | 1 | 4.70 |
| 圏 | 1 | 4.33 |
| 使用可能 | 1 | 4.45 |
| 名残 | 1 | 4.36 |
| エプロン | 1 | 4.08 |
| 色っぽい | 1 | 4.28 |
| 英雄 | 1 | 3.16 |
| 有効利用 | 1 | 5.08 |
| 叔母 | 1 | 4.22 |
| 珠玉 | 1 | 5.59 |
| 見かけ上 | 1 | 5.60 |
| 押し倒す | 1 | 4.27 |
| 首を垂れる | 1 | 5.35 |
| 悲しげ | 1 | 4.23 |
| 指令 | 1 | 4.31 |
| 軌道に乗る | 1 | 5.59 |
| グチャグチャ | 1 | 4.94 |
| 行き届く | 1 | 4.27 |
| 大掃除 | 1 | 4.98 |
| 携わる | 1 | 4.24 |
| 沸き上がる | 1 | 4.67 |
| いいえ | 1 | 3.41 |
| 麦わら帽子 | 1 | 5.02 |
| 顔を上げる | 1 | 3.78 |
| 働き詰め | 1 | 5.39 |
| 呆れかえる | 1 | 5.21 |
| 駆け回る | 1 | 4.25 |
| 棘 | 1 | 3.98 |
| 教え子 | 1 | 4.39 |
| 余儀なく | 1 | 4.55 |
| 習得 | 1 | 3.45 |
| 物事 | 1 | 3.93 |
| キャッキャ | 1 | 5.01 |
| モテない | 1 | 4.80 |
| 建設 | 1 | 3.96 |
| 照れ笑い | 1 | 4.97 |
| 空き部屋 | 1 | 4.81 |
| 名乗り | 1 | 3.99 |
| 救いの手 | 1 | 4.73 |
| アルコール | 1 | 4.24 |
| 反する | 1 | 4.38 |
| 敵わない | 1 | 3.95 |
| 吸い物 | 1 | 5.41 |
| 宿泊 | 1 | 4.09 |
| 体温 | 1 | 3.99 |
| 見誤る | 1 | 5.19 |
| に似て | 1 | 3.66 |
| 腰かけ | 1 | 4.29 |
| 女性用 | 1 | 4.79 |
| 山裾 | 1 | 5.18 |
| うまく行く | 1 | 5.32 |
| デスク | 1 | 4.63 |
| 精神状態 | 1 | 4.49 |
| L | 1 | 4.28 |
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