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 |
|---|---|---|
| 一苦労 | 1 | 4.51 |
| 胃袋 | 1 | 4.25 |
| 例にもれず | 1 | 5.49 |
| 留まり | 1 | 4.51 |
| ワーム | 1 | 4.47 |
| 公園 | 1 | 3.94 |
| 芝 | 1 | 4.67 |
| 何とやら | 1 | 4.92 |
| スローダウン | 1 | 6.64 |
| お早うございます | 1 | 5.19 |
| 無策 | 1 | 4.87 |
| 忌み嫌う | 1 | 4.64 |
| 引きもどす | 1 | 6.53 |
| 意気 | 1 | 4.54 |
| 涙ぐむ | 1 | 4.42 |
| 妊娠中 | 1 | 4.97 |
| 温か | 1 | 4.06 |
| 熟練 | 1 | 3.88 |
| 親心 | 1 | 4.95 |
| 買いたたく | 1 | 5.62 |
| 発音 | 1 | 4.29 |
| 気力 | 1 | 3.86 |
| 住まう | 1 | 4.00 |
| ばっくれ | 1 | 5.26 |
| 立ち入り禁止区域 | 1 | 5.62 |
| 地獄絵図 | 1 | 4.74 |
| 飛び越える | 1 | 4.05 |
| はせ参じる | 1 | 5.76 |
| まな板の上のコイ | 1 | 7.29 |
| 不在 | 1 | 3.86 |
| 指折り | 1 | 4.52 |
| 末永く | 1 | 4.82 |
| 御 | 1 | 3.20 |
| 立ち向かう | 1 | 3.92 |
| 胸がすく | 1 | 5.75 |
| 霞む | 1 | 4.20 |
| 小首 | 1 | 4.02 |
| 応用 | 1 | 3.85 |
| 花火 | 1 | 4.08 |
| 篤と | 1 | 4.82 |
| 百も承知 | 1 | 4.68 |
| 竹製 | 1 | 5.71 |
| 通り越す | 1 | 4.07 |
| 夏場 | 1 | 4.81 |
| 下方 | 1 | 4.73 |
| 伸びをする | 1 | 4.75 |
| 対戦 | 1 | 3.82 |
| 曾 | 1 | 4.91 |
| PETボトル | 1 | 4.58 |
| 語感 | 1 | 5.24 |
| 数年間 | 1 | 4.81 |
| 兄ちゃん | 1 | 3.55 |
| 風船 | 1 | 4.51 |
| 穴埋め | 1 | 4.94 |
| 収集 | 1 | 4.11 |
| 貢献 | 1 | 4.04 |
| 言い分け | 1 | 4.35 |
| 暇を見て | 1 | 5.47 |
| どうしたものか | 1 | 4.04 |
| 尻尾 | 1 | 3.15 |
| 苦 | 1 | 4.20 |
| 正装 | 1 | 4.31 |
| 風の音 | 1 | 4.56 |
| 付き物 | 1 | 5.02 |
| ガラス屋 | 1 | 5.84 |
| 必要条件 | 1 | 5.97 |
| 朝一 | 1 | 4.76 |
| 立憲君主制 | 1 | 5.78 |
| 宴会 | 1 | 3.97 |
| 伸し | 1 | 5.28 |
| 苦言 | 1 | 4.46 |
| この様に | 1 | 3.80 |
| 見出し | 1 | 4.36 |
| たじろぐ | 1 | 4.29 |
| と言ったら嘘になる | 1 | 5.75 |
| 平均的 | 1 | 4.42 |
| かっ飛ばす | 1 | 5.61 |
| 一礼 | 1 | 3.63 |
| 目を配る | 1 | 5.46 |
| 継ぐ | 1 | 3.64 |
| より小さい | 1 | 4.94 |
| 騎馬 | 1 | 3.83 |
| ベース | 1 | 4.03 |
| おどおど | 1 | 4.61 |
| 状況判断 | 1 | 4.88 |
| 縛り付ける | 1 | 4.30 |
| 繰り出す | 1 | 3.52 |
| 行先 | 1 | 4.84 |
| 鶏 | 1 | 4.04 |
| いいね | 1 | 3.98 |
| パンチ | 1 | 4.12 |
| ポッカリ | 1 | 5.17 |
| 出頭 | 1 | 4.94 |
| 済まなそう | 1 | 4.88 |
| 突出 | 1 | 4.47 |
| 給え | 1 | 4.07 |
| 凍える | 1 | 4.42 |
| 付け加え | 1 | 4.39 |
| 嗄れる | 1 | 4.58 |
| 何たる | 1 | 4.40 |
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