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 |
|---|---|---|
| 鼻歌 | 1 | 4.33 |
| 遂に | 1 | 3.82 |
| 満腹感 | 1 | 5.25 |
| 甘える | 1 | 3.94 |
| 垂直 | 1 | 4.33 |
| 婚前交渉 | 1 | 5.71 |
| 一山当てる | 1 | 6.69 |
| ちょっ | 1 | 3.80 |
| 二の腕 | 1 | 4.42 |
| ところ狭しと | 1 | 5.46 |
| 上陸 | 1 | 4.19 |
| 追いかけっこ | 1 | 4.50 |
| 禁じる | 1 | 4.01 |
| ケリ | 1 | 4.72 |
| 禁じ得ない | 1 | 4.86 |
| 錯覚 | 1 | 3.81 |
| 物陰 | 1 | 4.28 |
| 頼りになる | 1 | 4.07 |
| 甚い | 1 | 3.90 |
| 見出し | 1 | 4.36 |
| 空気が読めない | 1 | 5.21 |
| 家族サービス | 1 | 5.46 |
| おこし | 1 | 4.92 |
| 交わる | 1 | 4.38 |
| 苦虫をかみつぶしたよう | 1 | 5.46 |
| ひょろり | 1 | 6.21 |
| 真の | 1 | 3.65 |
| 夢見 | 1 | 4.29 |
| 微か | 1 | 3.53 |
| お盆 | 1 | 4.33 |
| 戒める | 1 | 4.81 |
| 前に進む | 1 | 4.47 |
| 天蛾 | 1 | 5.63 |
| 迎撃 | 1 | 3.60 |
| 対照的 | 1 | 3.99 |
| 緑茶 | 1 | 4.64 |
| ネガティブ | 1 | 4.60 |
| 自主 | 1 | 4.57 |
| 前歯 | 1 | 4.93 |
| 兼任 | 1 | 4.75 |
| 三十路 | 1 | 4.90 |
| しっぺ返し | 1 | 5.12 |
| 爆発音 | 1 | 4.20 |
| 裏側 | 1 | 4.14 |
| 足を止める | 1 | 4.17 |
| 血の気 | 1 | 4.13 |
| うめぇ | 1 | 5.12 |
| 陸 | 1 | 3.77 |
| 腰かけ | 1 | 4.29 |
| あろうことか | 1 | 4.40 |
| ブルブル | 1 | 4.73 |
| 越す | 1 | 3.95 |
| 久々 | 1 | 3.70 |
| 立つ瀬がない | 1 | 5.34 |
| 一着 | 1 | 4.68 |
| 存亡 | 1 | 4.85 |
| 鈍感 | 1 | 4.26 |
| 刺激臭 | 1 | 5.18 |
| 好意 | 1 | 3.72 |
| 轍 | 1 | 4.75 |
| クスッと | 1 | 5.15 |
| ほな | 1 | 4.66 |
| 王侯貴族 | 1 | 4.44 |
| だったろ | 1 | 4.89 |
| 乱戦 | 1 | 4.25 |
| 重大 | 1 | 3.95 |
| 五十日 | 1 | 4.07 |
| 記名 | 1 | 5.65 |
| 突出し | 1 | 5.24 |
| 小手調べ | 1 | 4.93 |
| 下方 | 1 | 4.73 |
| 聖母 | 1 | 4.37 |
| 思い悩む | 1 | 4.37 |
| ぶった切る | 1 | 4.78 |
| 危なく | 1 | 4.46 |
| 抱きすくめる | 1 | 4.85 |
| 段違い | 1 | 4.36 |
| 空前絶後 | 1 | 5.36 |
| 地雷原 | 1 | 5.23 |
| ドブネズミ | 1 | 5.49 |
| 洗い流す | 1 | 4.42 |
| 補助 | 1 | 3.65 |
| 某所 | 1 | 5.27 |
| 一声 | 1 | 4.20 |
| ううん | 1 | 3.63 |
| 職人 | 1 | 3.35 |
| 慰め | 1 | 3.79 |
| 掠り | 1 | 4.81 |
| 休ませる | 1 | 4.74 |
| 手桶 | 1 | 5.38 |
| 力を借りる | 1 | 4.63 |
| 歩きはじめ | 1 | 6.19 |
| 市街地 | 1 | 4.42 |
| ダイブ | 1 | 4.44 |
| 気が済まない | 1 | 4.75 |
| 舌打ち | 1 | 3.62 |
| 行動計画 | 1 | 5.94 |
| ハンカチ | 1 | 3.89 |
| お墨付き | 1 | 4.46 |
| 涙ぐむ | 1 | 4.42 |
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