[Well, that's nice and mysterious and completely incomprehensible, so Rin just... takes out his own phone obligingly and figures he might as well not think about it too hard. If he's really going to be a professional swimmer he should probably get used to his photos being used for who-knows-what.

At least she's just a high school girl.]

I got it. You want to be in the picture, right?

[His own phone still isn't great for capturing the sky at night or anything, but it's got to be better than a flip phone. And this actually does give him an excuse to snap his own picture of the sky under the guise of testing the resolution.]