The entire time I read this manga, I was expecting her modern smartphone to give away the fact that she was from the future, but it appears Seto was completely oblivious.
Yeah that the thing that bother me too. At least Seto should have asked was it a weird looking camera or something. And how can she charge her phone?
I just looked it up. Apparently micro USB has been around since 2007, and since her phone appears to be an Android, that’s probably the type of connector it uses for charging.