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 |
|---|---|---|
| 病む | 3 | 4.31 |
| 解 | 3 | 3.86 |
| 移る | 3 | 3.53 |
| 前日 | 3 | 4.05 |
| 予想通り | 3 | 3.69 |
| 今までにない | 3 | 4.56 |
| 怪訝 | 3 | 3.72 |
| ちっ | 3 | 3.66 |
| 候 | 3 | 4.09 |
| けり | 3 | 4.97 |
| 提示 | 3 | 3.79 |
| 全 | 3 | 3.31 |
| この目で | 3 | 4.34 |
| 引き渡し | 3 | 4.48 |
| 奥行き | 3 | 4.87 |
| 教育 | 3 | 3.34 |
| 差し手 | 3 | 3.97 |
| 咲かせる | 3 | 4.31 |
| 御座います | 3 | 4.55 |
| 斬り刻む | 3 | 5.61 |
| 分布 | 3 | 4.72 |
| プロ | 3 | 3.93 |
| をも | 3 | 3.54 |
| 夏休み | 3 | 3.96 |
| 第二 | 3 | 3.20 |
| スーツ姿 | 3 | 4.79 |
| 卒業 | 3 | 3.55 |
| 存じ上げる | 3 | 4.66 |
| 川幅 | 3 | 5.11 |
| 市街 | 3 | 4.57 |
| 上部 | 3 | 4.17 |
| 誰でも | 3 | 3.66 |
| 微笑 | 3 | 3.73 |
| 個目 | 3 | 4.09 |
| 達人 | 3 | 4.08 |
| 睨む | 3 | 3.25 |
| 小さい頃 | 3 | 4.07 |
| お帰りなさい | 3 | 3.97 |
| 言いようのない | 3 | 4.53 |
| 共にする | 3 | 4.31 |
| イタズラ | 3 | 4.49 |
| 侯爵 | 3 | 3.04 |
| 増やし | 3 | 3.81 |
| 一時 | 3 | 3.70 |
| 立ち回り | 3 | 4.47 |
| 日本海 | 3 | 5.44 |
| ボス | 3 | 3.34 |
| 自分でも | 3 | 3.59 |
| 裏付け | 3 | 4.56 |
| 逃げだす | 3 | 4.59 |
| 瞬時 | 4 | 3.67 |
| とか何とか | 4 | 4.08 |
| 着ける | 4 | 3.43 |
| 大穴 | 4 | 4.16 |
| ダメージを与える | 4 | 4.24 |
| 所で | 4 | 3.30 |
| 進み出る | 4 | 3.96 |
| 振り分け | 4 | 4.66 |
| 一万円 | 4 | 5.19 |
| 売淫 | 4 | 3.60 |
| 痛 | 4 | 3.74 |
| 小型 | 4 | 3.70 |
| 誰 | 4 | 2.78 |
| 雅語 | 4 | 4.02 |
| 男爵 | 4 | 3.29 |
| 面 | 4 | 3.13 |
| 快く | 4 | 4.08 |
| 面子 | 4 | 3.78 |
| 修行 | 4 | 3.46 |
| 未完成 | 4 | 4.57 |
| 層 | 4 | 3.29 |
| 腹違い | 4 | 4.89 |
| 何という | 4 | 3.57 |
| 築く | 4 | 3.67 |
| 瑞々しい | 4 | 4.55 |
| 掲げる | 4 | 3.37 |
| 草木 | 4 | 4.26 |
| 血肉 | 4 | 4.41 |
| 食いつく | 4 | 4.12 |
| 逃走 | 4 | 3.94 |
| 言いにくい | 4 | 4.59 |
| 崩壊 | 4 | 3.51 |
| 窮地 | 4 | 4.04 |
| 可愛らしい | 4 | 3.32 |
| と言われる | 4 | 3.54 |
| 無くして | 4 | 4.04 |
| 険しい顔 | 4 | 4.48 |
| 宣言 | 4 | 3.25 |
| 褒賞 | 4 | 4.46 |
| もどかしい | 4 | 4.26 |
| 下す | 4 | 3.54 |
| 非難 | 4 | 3.84 |
| 落ち着いた | 4 | 3.49 |
| 冠 | 4 | 4.08 |
| 始末 | 4 | 3.55 |
| 見あげる | 4 | 5.64 |
| 大好物 | 4 | 4.58 |
| 熟す | 4 | 3.95 |
| 踏む | 4 | 3.32 |
| 食欲 | 4 | 3.96 |
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