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 |
|---|---|---|
| 軽々しい | 1 | 4.45 |
| がら | 1 | 4.21 |
| 荒涼 | 1 | 5.22 |
| 守り抜く | 1 | 4.55 |
| 汝 | 1 | 3.78 |
| 後者 | 1 | 3.86 |
| 生活用品 | 1 | 5.02 |
| ブーイング | 1 | 4.80 |
| 争う | 1 | 3.75 |
| 別働隊 | 1 | 4.46 |
| 雑種 | 1 | 4.94 |
| ドキドキ | 1 | 3.90 |
| 上司 | 1 | 3.74 |
| 隠し持つ | 1 | 4.42 |
| 担保 | 1 | 4.68 |
| に過ぎない | 1 | 3.53 |
| プレッシャー | 1 | 4.06 |
| ホームシック | 1 | 5.23 |
| 安堵感 | 1 | 4.94 |
| 足らず | 1 | 4.19 |
| 押し通す | 1 | 4.51 |
| バカ者 | 1 | 5.25 |
| ホームタウン | 1 | 6.30 |
| 逸れる | 1 | 3.98 |
| 逆立てる | 1 | 4.62 |
| 競い合う | 1 | 4.51 |
| 潮流 | 1 | 5.12 |
| 下手を打つ | 1 | 5.70 |
| 臣民 | 1 | 4.51 |
| 限りなく | 1 | 4.09 |
| 竹竿 | 1 | 5.34 |
| お世話になる | 1 | 4.70 |
| 顕現 | 1 | 4.03 |
| ダンジョン | 1 | 2.91 |
| 刃こぼれ | 1 | 4.81 |
| 息巻く | 1 | 4.64 |
| 夏の盛り | 1 | 5.71 |
| 使い手 | 1 | 3.73 |
| 牛 | 1 | 3.67 |
| 高二 | 1 | 5.12 |
| 死角 | 1 | 4.04 |
| 恒例 | 1 | 4.54 |
| 長ける | 1 | 3.91 |
| 信 | 1 | 3.86 |
| 用心 | 1 | 4.26 |
| 豊満 | 1 | 4.45 |
| シーズン | 1 | 4.69 |
| テンション | 1 | 3.68 |
| 証言 | 1 | 3.95 |
| 忍耐力 | 1 | 5.13 |
| 落胆 | 1 | 4.10 |
| 横領 | 1 | 4.71 |
| 感謝の言葉もない | 1 | 5.90 |
| エントロピー | 1 | 5.69 |
| 追いすがる | 1 | 4.66 |
| 軽はずみ | 1 | 5.01 |
| 判別 | 1 | 3.99 |
| 狎れ狎れしい | 1 | 5.69 |
| 住人 | 1 | 3.49 |
| とめど無く | 1 | 5.00 |
| 困窮 | 1 | 4.59 |
| 射程 | 1 | 3.82 |
| 掌 | 1 | 3.53 |
| ゴミ箱 | 1 | 4.65 |
| レンガ | 1 | 4.32 |
| 変心 | 1 | 5.62 |
| ヒヤリ | 1 | 5.31 |
| 痛み入る | 1 | 4.85 |
| ジワリ | 1 | 5.46 |
| 保冷 | 1 | 4.62 |
| 設計 | 1 | 3.97 |
| 要領 | 1 | 4.07 |
| 熟睡 | 1 | 4.63 |
| あち | 1 | 4.91 |
| 速やか | 1 | 4.04 |
| 軒 | 1 | 4.27 |
| 仕切る | 1 | 4.15 |
| いつも通り | 1 | 3.43 |
| 寒風 | 1 | 5.17 |
| 牝鹿 | 1 | 4.47 |
| 消え失せる | 1 | 4.26 |
| 口癖 | 1 | 4.67 |
| 落 | 1 | 4.45 |
| 性能 | 1 | 3.48 |
| 成立 | 1 | 3.73 |
| メキメキ | 1 | 4.93 |
| 対極 | 1 | 4.74 |
| 会わせる | 1 | 4.33 |
| また明日 | 1 | 4.25 |
| 買い入れ | 1 | 5.63 |
| 受かる | 1 | 4.62 |
| 断然 | 1 | 4.47 |
| 異なる | 1 | 3.27 |
| 戦列 | 1 | 4.45 |
| 年末 | 1 | 4.49 |
| 遠ざかる | 1 | 3.90 |
| 晴れやかな笑顔 | 1 | 5.23 |
| 登場 | 1 | 3.44 |
| 由々しき | 1 | 4.87 |
| 均し | 1 | 5.02 |
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