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 |
|---|---|---|
| 女心 | 4 | 4.79 |
| 養う | 4 | 4.22 |
| 発見者 | 4 | 4.96 |
| 飛び立つ | 4 | 4.05 |
| うら若い | 4 | 4.99 |
| 対して | 4 | 3.82 |
| 内緒 | 4 | 3.91 |
| 材料 | 4 | 3.36 |
| 特殊 | 4 | 3.22 |
| 喋り | 4 | 3.80 |
| 後退 | 4 | 3.67 |
| 占める | 4 | 3.97 |
| 濡れ | 4 | 3.98 |
| 言い放つ | 4 | 3.62 |
| 相殺 | 4 | 4.04 |
| 小さめ | 4 | 4.41 |
| 白 | 4 | 3.00 |
| 事情 | 4 | 3.01 |
| 思考 | 4 | 3.07 |
| 山道 | 4 | 4.20 |
| 道路 | 4 | 4.07 |
| 田畑 | 4 | 4.63 |
| 宮殿 | 4 | 3.85 |
| 通例 | 4 | 4.69 |
| 縫う | 4 | 3.95 |
| 板張り | 4 | 5.00 |
| 吹っ切れる | 4 | 4.56 |
| 誰 | 4 | 2.78 |
| ぶっ | 4 | 3.55 |
| その気 | 4 | 3.88 |
| バカに | 4 | 4.12 |
| 弟 | 4 | 3.14 |
| 言いわけ | 4 | 5.57 |
| 時間帯 | 4 | 3.96 |
| タイヤ | 4 | 4.53 |
| からに | 4 | 3.79 |
| 不自然 | 4 | 3.62 |
| ウキウキ | 4 | 4.66 |
| 下さる | 4 | 3.31 |
| 孕む | 4 | 4.21 |
| 透ける | 4 | 4.13 |
| 良好 | 4 | 4.06 |
| 底力 | 4 | 5.14 |
| 今すぐ | 4 | 3.54 |
| 合わせ | 4 | 3.63 |
| トランクス | 4 | 5.26 |
| 免状 | 4 | 5.18 |
| 切れ | 4 | 3.38 |
| 大家族 | 4 | 5.30 |
| おい | 4 | 2.87 |
| 全長 | 4 | 4.06 |
| 抑え込む | 4 | 4.17 |
| 骨 | 4 | 3.21 |
| お見舞い | 4 | 4.28 |
| 鋭利 | 4 | 4.30 |
| まんまと | 4 | 4.39 |
| 方角 | 4 | 3.79 |
| バラ | 4 | 3.96 |
| 短時間 | 4 | 3.94 |
| 高速 | 4 | 3.51 |
| 座布団 | 4 | 4.68 |
| してみると | 4 | 4.17 |
| 領域 | 4 | 3.48 |
| 褒賞 | 4 | 4.46 |
| 平たい | 4 | 4.60 |
| 会社 | 4 | 3.72 |
| 負ける | 4 | 3.03 |
| 力説 | 4 | 4.55 |
| 抑える | 4 | 3.54 |
| 親 | 4 | 3.18 |
| 抱きしめる | 4 | 3.35 |
| 尚 | 4 | 3.00 |
| 行き倒れ | 4 | 4.94 |
| まくし立てる | 4 | 4.54 |
| 嫡男 | 4 | 4.13 |
| 深夜 | 4 | 3.90 |
| 光沢 | 4 | 4.32 |
| 所へ | 4 | 3.57 |
| それもそうだ | 4 | 4.28 |
| 駿河 | 4 | 3.31 |
| 決まり | 4 | 3.89 |
| きりり | 4 | 5.06 |
| 草原 | 4 | 3.51 |
| 秘 | 4 | 4.46 |
| 受験者 | 4 | 4.76 |
| 落ち着いた | 4 | 3.49 |
| とてもじゃないが | 4 | 4.51 |
| 財宝 | 4 | 4.20 |
| 一変 | 4 | 4.08 |
| 頷き | 4 | 3.24 |
| 大した | 4 | 3.24 |
| 垓 | 4 | 3.39 |
| 呼び方 | 4 | 4.05 |
| に決まっている | 4 | 4.04 |
| 滅ぼす | 4 | 3.50 |
| シンプル | 4 | 3.78 |
| 米 | 4 | 3.70 |
| 越える | 4 | 3.59 |
| パソコン | 4 | 4.05 |
| やっぱ | 4 | 3.52 |
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