Responses
I think both were speaking in English because both were "kings" so they probably studied this language.
Maybe...but the prince had a plane...why was he curious about the city during the date scene like he was from another world though? Lol
Spoiler I think...
When I read the summary, I thought the mirror was a portal to another world, but it was actually just a teleportation device to another country. It’s a bit funny that the prince could speak Japanese too. I think the author initially wanted it to be another world but maybe had to adjust because it needed to be shorter or something.
I like the story and art a lot though regardless.