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 |
|---|---|---|
| キッチリ | 5 | 4.67 |
| 想う | 5 | 3.60 |
| 脚 | 5 | 3.41 |
| ギリギリ | 5 | 3.53 |
| 働き | 5 | 3.64 |
| キープ | 5 | 4.49 |
| メイン | 5 | 3.56 |
| どこぞ | 5 | 4.10 |
| 頭から | 5 | 3.72 |
| 山奥 | 5 | 4.46 |
| 影響 | 5 | 3.05 |
| 何より | 5 | 3.02 |
| 伺う | 5 | 3.58 |
| 本命 | 5 | 3.97 |
| 心地いい | 5 | 4.65 |
| 誓う | 5 | 3.69 |
| 宙 | 5 | 3.47 |
| 定項 | 5 | 3.84 |
| 励む | 5 | 3.90 |
| 見送る | 5 | 3.37 |
| ビル | 5 | 3.97 |
| 自転車 | 5 | 4.12 |
| 追いかける | 5 | 3.34 |
| 手間 | 5 | 3.57 |
| 長話 | 5 | 4.78 |
| 物がある | 5 | 3.46 |
| 似る | 5 | 3.03 |
| 戦闘能力 | 5 | 3.89 |
| 亡き | 5 | 3.83 |
| 数値 | 5 | 3.94 |
| 釣り道具 | 5 | 5.51 |
| 化粧 | 5 | 4.00 |
| 一段 | 5 | 4.26 |
| 難い | 5 | 3.79 |
| 近寄る | 5 | 3.45 |
| 気をつけて | 5 | 3.82 |
| 変態 | 5 | 3.55 |
| 新しく | 5 | 3.70 |
| 何処まで | 5 | 3.49 |
| 歴史 | 5 | 3.34 |
| ハマる | 5 | 4.39 |
| 一体に | 5 | 4.71 |
| 手ぬぐい | 5 | 4.79 |
| 付き合う | 5 | 3.28 |
| エビ | 5 | 4.40 |
| 買う | 5 | 2.81 |
| はしゃぐ | 5 | 3.80 |
| 漆黒 | 5 | 3.61 |
| 飛ばす | 5 | 3.20 |
| あらあら | 5 | 4.01 |
| もしもの事 | 5 | 4.86 |
| 時折 | 5 | 3.49 |
| 手おけ | 5 | 3.35 |
| 絡める | 5 | 4.00 |
| 下着 | 5 | 3.75 |
| 鈍い | 5 | 3.68 |
| 代物 | 5 | 3.64 |
| 専門 | 5 | 3.87 |
| 毎年 | 5 | 3.95 |
| 乃公 | 5 | 3.15 |
| 当てはまる | 5 | 4.23 |
| なりません | 5 | 3.51 |
| 弾丸 | 5 | 3.63 |
| 罵り | 5 | 4.61 |
| 神秘的 | 5 | 4.36 |
| けが人 | 5 | 4.99 |
| 東部 | 5 | 4.06 |
| 見上げる | 5 | 3.03 |
| 譲る | 5 | 3.54 |
| 当たり | 5 | 3.81 |
| モジモジ | 5 | 4.77 |
| 着る | 5 | 3.35 |
| 圧倒 | 5 | 3.78 |
| 待った | 5 | 3.67 |
| ません | 5 | 3.24 |
| 内側 | 5 | 3.53 |
| 親密 | 5 | 4.47 |
| 配る | 5 | 3.69 |
| 疲弊 | 5 | 4.10 |
| 威高 | 5 | 3.54 |
| 通し | 5 | 3.74 |
| 王族 | 5 | 3.11 |
| 奇譚 | 5 | 3.49 |
| なよ | 5 | 3.13 |
| この人 | 5 | 3.25 |
| 飛んだ | 5 | 3.76 |
| 自力 | 5 | 3.88 |
| 紫がかった | 5 | 5.44 |
| 真新しい | 5 | 4.50 |
| 叩く | 5 | 2.98 |
| 悠長 | 5 | 4.24 |
| じっと | 5 | 3.19 |
| 転移 | 5 | 2.83 |
| ほほ | 5 | 4.30 |
| 両断 | 5 | 4.06 |
| 昼休憩 | 5 | 5.01 |
| 達成 | 5 | 3.61 |
| 振る舞い | 5 | 3.85 |
| 罪人 | 5 | 4.02 |
| 平気 | 5 | 3.56 |
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