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 |
|---|---|---|
| 遺志 | 1 | 5.00 |
| グチャグチャ | 1 | 4.94 |
| 水圧 | 1 | 4.91 |
| 晴れやかな笑顔 | 1 | 5.23 |
| 沼 | 1 | 4.12 |
| 呼びかけ | 1 | 3.81 |
| 態度をとる | 1 | 4.95 |
| 失格 | 1 | 4.23 |
| 針のムシロ | 1 | 6.36 |
| 工房 | 1 | 3.31 |
| 司る | 1 | 3.89 |
| 誰彼かまわず | 1 | 5.69 |
| 推進 | 1 | 4.32 |
| 窺う | 1 | 3.55 |
| 走破 | 1 | 4.91 |
| 外米 | 1 | 5.45 |
| 志す | 1 | 4.61 |
| 妊婦 | 1 | 4.61 |
| 相反する | 1 | 4.61 |
| 出撃 | 1 | 4.08 |
| 溜息 | 1 | 3.34 |
| 文句を言う | 1 | 4.18 |
| 突っ走る | 1 | 4.52 |
| 活劇 | 1 | 5.51 |
| ごにょごにょ | 1 | 5.11 |
| ギャップ | 1 | 4.28 |
| 禁じる | 1 | 4.01 |
| 契り | 1 | 4.76 |
| 労う | 1 | 4.28 |
| 布石 | 1 | 4.56 |
| 栄える | 1 | 4.70 |
| 軌道 | 1 | 3.69 |
| 免 | 1 | 4.71 |
| 一筋縄ではいかない | 1 | 4.91 |
| 信憑性 | 1 | 4.36 |
| 弾く | 1 | 3.37 |
| 生命体 | 1 | 4.23 |
| 台詞 | 1 | 3.47 |
| 逆境 | 1 | 4.87 |
| 企み | 1 | 4.33 |
| 寝巻 | 1 | 5.28 |
| 今更ながら | 1 | 4.17 |
| かん | 1 | 4.46 |
| ダイヤモンド | 1 | 4.53 |
| ある人 | 1 | 4.17 |
| 平然 | 1 | 4.05 |
| 外敵 | 1 | 4.41 |
| 干渉 | 1 | 3.54 |
| 上乗せ | 1 | 4.33 |
| 軋む | 1 | 4.05 |
| 受信 | 1 | 4.68 |
| 代る | 1 | 4.99 |
| もがき | 1 | 4.75 |
| 付いてる | 1 | 3.92 |
| 緊急 | 1 | 3.80 |
| 書籍化 | 1 | 4.50 |
| かむ | 1 | 4.61 |
| 小学校 | 1 | 4.12 |
| 開いた口がふさがらない | 1 | 5.79 |
| 埒外 | 1 | 4.94 |
| 意地悪 | 1 | 3.91 |
| 察 | 1 | 4.58 |
| 股間 | 1 | 4.27 |
| 投げ飛ばす | 1 | 4.36 |
| 焼き付け | 1 | 4.76 |
| 規定 | 1 | 4.26 |
| 溶く | 1 | 4.93 |
| 特徴的 | 1 | 3.99 |
| 給金 | 1 | 4.28 |
| 唐木 | 1 | 5.10 |
| 家屋 | 1 | 4.17 |
| 動じる | 1 | 4.07 |
| きっちり | 1 | 3.72 |
| 一苦労 | 1 | 4.51 |
| 悪影響 | 1 | 4.43 |
| こぶし大 | 1 | 5.34 |
| 郊外 | 1 | 4.29 |
| 寄越す | 1 | 3.88 |
| 鬱憤を晴らす | 1 | 5.10 |
| 思い出話 | 1 | 4.77 |
| 無理しないで | 1 | 4.88 |
| よれ | 1 | 5.47 |
| 湖底 | 1 | 5.06 |
| 居なくなる | 1 | 4.05 |
| くぎ付け | 1 | 5.64 |
| 併設 | 1 | 4.55 |
| 美しさ | 1 | 3.72 |
| 愛 | 1 | 3.07 |
| 拒絶 | 1 | 3.76 |
| 持ち越す | 1 | 5.25 |
| 備える | 1 | 3.84 |
| 在庫 | 1 | 4.13 |
| 売り込む | 1 | 4.69 |
| 生き延びる | 1 | 3.88 |
| ビリビリ | 1 | 4.51 |
| お気に入り | 1 | 3.82 |
| おめでとう | 1 | 3.91 |
| 大企業 | 1 | 4.91 |
| 空き部屋 | 1 | 4.81 |
| ひらり | 1 | 4.37 |
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