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 |
|---|---|---|
| サボる | 1 | 4.17 |
| 得意顔 | 1 | 5.42 |
| 始めて | 1 | 3.15 |
| 水汲み | 1 | 4.94 |
| あー | 1 | 2.91 |
| 誤報 | 1 | 5.31 |
| ザックザク | 1 | 6.36 |
| やせ型 | 1 | 6.43 |
| くどい | 1 | 4.76 |
| 立ち居振る舞い | 1 | 4.66 |
| 勇者 | 1 | 2.61 |
| 炊ける | 1 | 5.29 |
| 甚大 | 1 | 4.33 |
| 何事 | 1 | 4.06 |
| 切ない | 1 | 4.07 |
| 時空 | 1 | 3.47 |
| ダルマ | 1 | 4.88 |
| 依估 | 1 | 4.62 |
| レジスタンス | 1 | 4.51 |
| 逃れる | 1 | 3.70 |
| 牙虫 | 1 | 6.51 |
| 血の滲むよう | 1 | 5.40 |
| 三枚 | 1 | 4.26 |
| 苦言 | 1 | 4.46 |
| ダンジョン | 1 | 2.91 |
| 回転 | 1 | 3.46 |
| 誤字脱字 | 1 | 4.12 |
| 習得 | 1 | 3.45 |
| 夜行性 | 1 | 4.92 |
| 腰が抜ける | 1 | 5.76 |
| 貸してあげる | 1 | 5.19 |
| 早生 | 1 | 4.48 |
| 星印 | 1 | 6.34 |
| 表す | 1 | 3.61 |
| 這いつくばる | 1 | 5.06 |
| のこのこ | 1 | 4.87 |
| ようやっと | 1 | 4.83 |
| 不注意 | 1 | 4.88 |
| 西暦 | 1 | 5.16 |
| 駆け付ける | 1 | 4.30 |
| 計り | 1 | 4.59 |
| 天真爛漫 | 1 | 4.76 |
| 卒業生 | 1 | 4.49 |
| 奉公 | 1 | 4.79 |
| 当の本人 | 1 | 4.31 |
| 異変 | 1 | 3.77 |
| 極め | 1 | 4.64 |
| 受け付ける | 1 | 4.38 |
| よたよた | 1 | 4.90 |
| 何たる | 1 | 4.40 |
| 何れにも | 1 | 5.27 |
| 無邪気 | 1 | 3.81 |
| 添え木 | 1 | 5.42 |
| 色っぽい | 1 | 4.28 |
| 視点 | 1 | 3.59 |
| ぽっきり | 1 | 5.09 |
| 仮にも | 1 | 4.03 |
| 官爵 | 1 | 5.85 |
| 委細 | 1 | 5.35 |
| 知れ渡る | 1 | 4.22 |
| ハテナマーク | 1 | 5.44 |
| 策 | 1 | 3.50 |
| グロ | 1 | 4.56 |
| 温か | 1 | 4.06 |
| 取り上げ | 1 | 4.11 |
| 手掛かり | 1 | 4.29 |
| 群生 | 1 | 4.87 |
| 手放す | 1 | 3.83 |
| 初体験 | 1 | 4.84 |
| 夢のまた夢 | 1 | 4.95 |
| プンプン | 1 | 4.81 |
| 物とする | 1 | 4.64 |
| うとうと | 1 | 4.62 |
| 目標達成 | 1 | 5.35 |
| ペアを組む | 1 | 5.91 |
| テンション | 1 | 3.68 |
| 追っ払う | 1 | 5.16 |
| 荷受 | 1 | 5.65 |
| 生きぬく | 1 | 6.18 |
| 忠実 | 1 | 3.95 |
| あのね | 1 | 3.94 |
| 丸みを帯びた | 1 | 5.00 |
| じっとり | 1 | 4.64 |
| 近いうちに | 1 | 4.26 |
| 初めは | 1 | 3.67 |
| プラチナ | 1 | 4.40 |
| 丸め込む | 1 | 4.87 |
| 商店街 | 1 | 4.34 |
| 人出 | 1 | 4.66 |
| ご機嫌 | 1 | 4.03 |
| 代わり | 1 | 3.62 |
| 体温 | 1 | 3.99 |
| 海水 | 1 | 4.15 |
| 大きすぎる | 1 | 4.25 |
| 今更ながら | 1 | 4.17 |
| 偽る | 1 | 4.21 |
| 覆水盆に返らず | 1 | 6.10 |
| 寮 | 1 | 3.64 |
| 栄養 | 1 | 4.05 |
| 鱗 | 1 | 3.40 |
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