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 |
|---|---|---|
| 無双 | 1 | 4.21 |
| 男勝り | 1 | 5.12 |
| とどのつまり | 1 | 5.35 |
| 四割 | 1 | 4.87 |
| 切り殺す | 1 | 5.89 |
| 晴れ舞台 | 1 | 5.13 |
| 保持 | 1 | 4.11 |
| 一回り | 1 | 4.12 |
| 盾 | 1 | 2.83 |
| 見出し | 1 | 4.36 |
| 体面 | 1 | 4.63 |
| ハイジャンプ | 1 | 5.88 |
| 言いくるめる | 1 | 4.75 |
| 高三 | 1 | 5.96 |
| この様に | 1 | 3.80 |
| 歴然 | 1 | 4.72 |
| はせ参じる | 1 | 5.76 |
| 十一 | 1 | 4.01 |
| 出し値 | 1 | 3.94 |
| 涙ぐむ | 1 | 4.42 |
| ぶった切る | 1 | 4.78 |
| 栄養 | 1 | 4.05 |
| 精巧 | 1 | 4.53 |
| 決定的 | 1 | 3.96 |
| 停車 | 1 | 4.69 |
| 気が付く | 1 | 3.32 |
| 流出 | 1 | 4.43 |
| 引継ぎ | 1 | 4.79 |
| 修復 | 1 | 3.54 |
| 疑問符 | 1 | 4.36 |
| セット | 1 | 3.54 |
| 宝石店 | 1 | 5.38 |
| 雲 | 1 | 3.58 |
| 寝所 | 1 | 4.51 |
| 原作 | 1 | 4.31 |
| ポロシャツ | 1 | 5.89 |
| やあ | 1 | 3.89 |
| お伺い | 1 | 4.36 |
| 怒涛 | 1 | 4.45 |
| 繁吹 | 1 | 4.70 |
| 立案者 | 1 | 5.49 |
| 分だけ | 1 | 4.01 |
| ドリーム | 1 | 5.15 |
| 掛かりきり | 1 | 5.02 |
| 時報 | 1 | 5.74 |
| 順を追って | 1 | 4.90 |
| 涼 | 1 | 4.32 |
| 必ずしも | 1 | 4.10 |
| 立場に立つ | 1 | 5.72 |
| 二階 | 1 | 3.68 |
| 縛り付ける | 1 | 4.30 |
| 愚行 | 1 | 4.57 |
| さすれば | 1 | 4.67 |
| どこの馬の骨 | 1 | 5.00 |
| 予想外 | 1 | 3.46 |
| 濡れる | 1 | 3.84 |
| 上出来 | 1 | 4.45 |
| キャッ | 1 | 4.92 |
| パチパチ | 1 | 4.39 |
| 脈 | 1 | 4.31 |
| 呆け | 1 | 4.01 |
| 議員立法 | 1 | 7.59 |
| がね | 1 | 3.58 |
| 引き絞る | 1 | 4.43 |
| 最前線 | 1 | 3.94 |
| 厨房 | 1 | 3.70 |
| 手薄 | 1 | 4.53 |
| 応募 | 1 | 4.57 |
| あのね | 1 | 3.94 |
| 当たり外れ | 1 | 5.59 |
| 食文化 | 1 | 4.86 |
| みそ | 1 | 5.42 |
| 諦めが悪い | 1 | 5.49 |
| 準 | 1 | 3.95 |
| 獲れる | 1 | 4.89 |
| 偉く | 1 | 4.20 |
| 宝の山 | 1 | 4.98 |
| 背伸び | 1 | 4.30 |
| 派 | 1 | 3.22 |
| リアクション | 1 | 4.20 |
| 台詞回し | 1 | 5.88 |
| 申し分ない | 1 | 4.47 |
| サンキュー | 1 | 4.77 |
| 石川県 | 1 | 6.24 |
| 致し方ない | 1 | 4.42 |
| 怪異 | 1 | 4.64 |
| もの凄い | 1 | 4.29 |
| 芋掘り | 1 | 5.99 |
| 順当 | 1 | 4.53 |
| 二通り | 1 | 5.28 |
| 残りかす | 1 | 5.83 |
| クギ | 1 | 5.84 |
| 地理的 | 1 | 4.93 |
| シリーズ物 | 1 | 5.97 |
| 手桶 | 1 | 5.38 |
| 会議室 | 1 | 3.81 |
| 湖底 | 1 | 5.06 |
| そっちのけ | 1 | 4.75 |
| 三枚 | 1 | 4.26 |
| 強まる | 1 | 4.38 |
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