He wakes up with a rasping gasp and immediately sits up and starts coughing.
What... the fuck?
Yeah. I might want your help, too, later, 'cause something Fujioka mentioned yesterday could possibly affect how costly magic is is bringing things and people with me into time stop.
I will help you test your MAGICAL POWERS, I am not yet over how we have magical powers!
...you're so cute. I want to kiss you again. I think I want that all the time, actually, but still.
No, we can also do that while playing with them, I wanna see if spending time in stopped time costs more magic if I bring someone with so we'll have all this extra time to kill...
Okay, I'm convinced. As long as we don't get too carried away and wind up overstaying our intended stopped time.
We'll be good and set an alarm. But we'll need to repeat the experiment a few times to make sure our results are solid.
Yutaka didn't drive to school this morning, so after school he walks Haru to his mother's car for the sake of appearances (and because he enjoys it) and then they both magic up and roof hop to Yutaka's apartment.
"Home, empty home. If I'd known I was going to become a magical boy I'd have tried to get my old man to find me an apartment with more reasonable window heights."
"They do not! It would be insane and I'd probably have permanent anxiety of ever getting too close to them if they did."
Here! One of them is a simple handheld device, the other has this fancy-looking box with a bunch more metrics than just illuminance.
Haru reads the instructions and then baubles his gem to check what they each have to say about it.
Well the displays show some numbers but they'll probably need to Google what those numbers indicate exactly. There's illuminance, luminance, luminous intensity, luminous flux, including a little camera display that'll show whatever the measurer is seeing with false colours corresponding to local luminance, and another display has all of those values split between bands of the visible light spectrum.