Ah, you seem to be one of the people from a more advanced world. [Hakkai laughs easily, tapping through his own phone to display his number and turning it so the boy can see.]

That's my number; feel free to call me if you have questions, or need a hand.

[Especially if he doesn't have a shinki.]

Some of the people who arrive here have never heard of any kind of phone, so I thought I'd ask.