It's impressive how frequently I find myself thinking "this has been the worst chapter yet" with this manga. This is starting to reach DeadTube levels of stupid.
I think tying the watch to a scientific explanation is a mistake, it make sense for Steins Gate, the story revolves around it and they do a good job at making it credible like a Crichton story, but here the scientist seems like a mix between a Reddit stereotype of someone loving science and a typical Manga Otaku.
I think "magic" would have been more palatable in this case, they are also adding more layers to the story but it doesn't feel like we are getting closer to the heart of it,
there is more bread which brings us further away from the meat.