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 |
|---|---|---|
| シリーズ物 | 1 | 5.97 |
| 供給 | 1 | 3.80 |
| 見返り | 1 | 4.29 |
| 没収 | 1 | 4.39 |
| 八つ目 | 1 | 4.96 |
| 残忍 | 1 | 4.77 |
| 舌 | 1 | 3.47 |
| 降ろす | 1 | 3.99 |
| 用具 | 1 | 4.95 |
| 言葉に甘える | 1 | 5.56 |
| 通過儀礼 | 1 | 5.26 |
| 人数分 | 1 | 4.40 |
| 呆け | 1 | 4.01 |
| 食い下がる | 1 | 4.39 |
| ナンボ | 1 | 5.45 |
| 知れ渡る | 1 | 4.22 |
| 息を合わせる | 1 | 5.97 |
| 代わり | 1 | 3.62 |
| エキサイト | 1 | 5.46 |
| 相も変らず | 1 | 6.10 |
| 位置取り | 1 | 4.72 |
| 岸 | 1 | 4.49 |
| 爆発的 | 1 | 4.23 |
| 陰で | 1 | 4.43 |
| 月給 | 1 | 5.38 |
| 言うなれば | 1 | 4.25 |
| 久しく | 1 | 4.70 |
| 歯抜け | 1 | 5.69 |
| 冷気 | 1 | 4.02 |
| 大絶賛 | 1 | 5.22 |
| 限りなく | 1 | 4.09 |
| 羽子 | 1 | 3.71 |
| 変心 | 1 | 5.62 |
| 照れ笑い | 1 | 4.97 |
| 激烈 | 1 | 4.96 |
| 抜け出す | 1 | 3.74 |
| 眼差し | 1 | 3.40 |
| 手のうち | 1 | 5.79 |
| 指定 | 1 | 3.37 |
| 脅し | 1 | 3.90 |
| 赤の他人 | 1 | 4.66 |
| 片刃 | 1 | 4.58 |
| 墓穴を掘る | 1 | 5.48 |
| ぷいと | 1 | 5.05 |
| 通りかかる | 1 | 4.74 |
| 撃退 | 1 | 3.82 |
| 当てはめる | 1 | 4.71 |
| 専門店 | 1 | 4.75 |
| そこかしこ | 1 | 4.28 |
| なぞ | 1 | 4.17 |
| 親戚 | 1 | 3.93 |
| 満杯 | 1 | 5.03 |
| 行き違い | 1 | 4.90 |
| 苦悶 | 1 | 4.16 |
| 飛び道具 | 1 | 4.56 |
| 音頭 | 1 | 4.79 |
| 加入 | 1 | 4.17 |
| 鍔 | 1 | 4.63 |
| 結婚適齢期 | 1 | 5.17 |
| シーズン | 1 | 4.69 |
| 吹きかける | 1 | 4.66 |
| 服飾店 | 1 | 5.17 |
| 順を追って | 1 | 4.90 |
| お早う | 1 | 5.26 |
| 主力 | 1 | 4.03 |
| 応募 | 1 | 4.57 |
| 一割 | 1 | 4.37 |
| 寝具 | 1 | 4.36 |
| 風通し | 1 | 4.96 |
| 破損 | 1 | 4.22 |
| 異なる | 1 | 3.27 |
| 中腰 | 1 | 4.94 |
| 希少価値 | 1 | 4.88 |
| ばかりか | 1 | 4.26 |
| 邪 | 1 | 3.68 |
| 包み | 1 | 3.81 |
| 絶対安全 | 1 | 5.51 |
| 免除 | 1 | 4.47 |
| 歴然 | 1 | 4.72 |
| 再認識 | 1 | 4.63 |
| 泥路 | 1 | 4.73 |
| 妨害 | 1 | 3.80 |
| 婦人 | 1 | 4.15 |
| 狐 | 1 | 3.42 |
| ぽっきり | 1 | 5.09 |
| トロ | 1 | 4.62 |
| お下がり | 1 | 4.79 |
| 来訪 | 1 | 4.06 |
| 苦笑 | 1 | 3.03 |
| 冊 | 1 | 4.22 |
| 大魚 | 1 | 5.39 |
| 耐え忍ぶ | 1 | 4.96 |
| たぐり寄せる | 1 | 5.81 |
| 作り笑い | 1 | 4.92 |
| 見定める | 1 | 4.21 |
| 膠 | 1 | 4.77 |
| 跳びあがる | 1 | 6.03 |
| 奈 | 1 | 4.04 |
| 得意顔 | 1 | 5.42 |
| わっ | 1 | 3.63 |
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