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 |
|---|---|---|
| 推移 | 1 | 4.50 |
| 金属探知 | 1 | 6.49 |
| 人道的 | 1 | 5.09 |
| 三枚 | 1 | 4.26 |
| 殊勝 | 1 | 4.50 |
| 無意味 | 1 | 3.75 |
| 山肌 | 1 | 4.89 |
| 戯れる | 1 | 4.58 |
| 濁る | 1 | 4.15 |
| みみっちい | 1 | 5.32 |
| 幸いにも | 1 | 4.21 |
| 錯覚 | 1 | 3.81 |
| 十本 | 1 | 4.61 |
| 聳える | 1 | 4.30 |
| ニヤニヤ | 1 | 3.81 |
| 山すそ | 1 | 6.78 |
| 溶く | 1 | 4.93 |
| 心神 | 1 | 5.28 |
| ぐつぐつ | 1 | 5.13 |
| 驚かせる | 1 | 4.66 |
| 断罪 | 1 | 4.08 |
| 一筋縄ではいかない | 1 | 4.91 |
| 戒める | 1 | 4.81 |
| 悪うございました | 1 | 5.84 |
| 反動 | 1 | 3.82 |
| 割合 | 1 | 4.06 |
| 全身全霊 | 1 | 4.39 |
| よしよし | 1 | 4.11 |
| 大多数 | 1 | 4.25 |
| 株 | 1 | 4.41 |
| 心の拠り所 | 1 | 5.16 |
| 温情 | 1 | 4.58 |
| 猛スピード | 1 | 4.74 |
| 棚から牡丹餅 | 1 | 5.95 |
| 風を切る | 1 | 4.78 |
| 美少年 | 1 | 4.35 |
| 驕り | 1 | 4.81 |
| 方がよい | 1 | 4.76 |
| 激論 | 1 | 5.48 |
| 飛び込み | 1 | 4.37 |
| 日が暮れる | 1 | 4.52 |
| ピンク色 | 1 | 4.23 |
| 繋がり | 1 | 3.49 |
| ガス | 1 | 3.77 |
| 鹿肉 | 1 | 5.03 |
| 始点 | 1 | 3.69 |
| 顔を上げる | 1 | 3.78 |
| 祝賀 | 1 | 5.06 |
| 甚だしい | 1 | 4.51 |
| 荷渡し | 1 | 4.31 |
| 包み | 1 | 3.81 |
| 恐々 | 1 | 5.17 |
| 生活圏 | 1 | 5.01 |
| 金網 | 1 | 5.09 |
| 仕末 | 1 | 5.81 |
| 噛りつく | 1 | 6.81 |
| 突出し | 1 | 5.24 |
| 鋼鉄 | 1 | 4.02 |
| 近場 | 1 | 4.23 |
| ぶた | 1 | 5.16 |
| 選抜試験 | 1 | 5.38 |
| 乱戦 | 1 | 4.25 |
| 一朝一夕 | 1 | 4.74 |
| 両端 | 1 | 4.48 |
| 持ちこたえる | 1 | 4.52 |
| よだつ | 1 | 5.30 |
| 背筋が凍る | 1 | 4.85 |
| 心のよりどころ | 1 | 6.03 |
| 舐め | 1 | 3.66 |
| 切り殺す | 1 | 5.89 |
| 逮捕 | 1 | 4.26 |
| やせ細る | 1 | 5.00 |
| 凍える | 1 | 4.42 |
| 物おじ | 1 | 5.85 |
| 若造 | 1 | 4.36 |
| 遠目 | 1 | 3.86 |
| しぶとい | 1 | 4.44 |
| 断然 | 1 | 4.47 |
| 熱力学第二法則 | 1 | 7.59 |
| 破邪 | 1 | 4.63 |
| 山裾 | 1 | 5.18 |
| 補佐役 | 1 | 4.84 |
| 伝染る | 1 | 5.00 |
| 聞き流す | 1 | 4.07 |
| 胸元 | 1 | 3.60 |
| しっとり | 1 | 4.45 |
| 電気 | 1 | 4.05 |
| チョイス | 1 | 4.61 |
| 忙殺 | 1 | 5.03 |
| 空前絶後 | 1 | 5.36 |
| 満足げ | 1 | 4.01 |
| 握り拳 | 1 | 4.71 |
| 周期性 | 1 | 6.81 |
| 鼓動 | 1 | 3.91 |
| 汝 | 1 | 3.78 |
| お疲れさま | 1 | 4.25 |
| エネルギー | 1 | 3.55 |
| 乖離 | 1 | 4.74 |
| 摘む | 1 | 4.02 |
| へし折る | 1 | 4.16 |
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