Hundred Years

"So you came back that quickly?" Kaguya Ōtsutsuki looked at Kenichi Amamiya before her in surprise. She knew Kenichi Amamiya was special and could use the Time Machine to travel to any Timeline at will, but she had not expected him, who had been conducting investigations elsewhere just moments ago, to appear before her so quickly. Kenichi Amamiya smiled and nodded, then rubbed his brow wearily. To Kaguya Ōtsutsuki, it had indeed not been long since he left, but for Kenichi Amamiya, a very long time had already passed—so long that he was somewhat dazed by it. Strictly speaking, he had spent this period busy with his own affairs, and those matters had exhausted him. Although the Time Machine was extremely powerful, each jump through time left him deeply fatigued, so after making too many jumps, he needed to stop and rest for a while. From the time Kenichi Amamiya left until his return, a full hundred years had passed. Of course, those hundred years were only the time Kenichi Amamiya spent resting. If the time spent jumping was included, even he did not know how long he had lived through. In any case, it had been long—especially long, long enough to drive a person to despair. Still, thanks to Kenichi Amamiya constantly pulling himself up by his own bootstraps during that time, he had brought back a highly refined set of Industrial Taijutsu techniques and knowledge from the future. With that, the world could develop much faster. Kenichi Amamiya had originally planned to jump directly to the future age of planet-destroying combat power, but as future technology advanced through his continuous efforts, it also became increasingly difficult to push forward. He had jumped back and forth dozens of times without producing any results. Kenichi Amamiya felt that they had