You can see him in the first panel, establishing him being at the same place as Anzu. And then you can see both him and Kirarin using phones in the last panel, so he texted her.
I expected it, but she's just sending me pictures of cold sweets...
Cinderella Girls Theater
劇場第1139『涼しくしてくれ』
Theater Episode 1139 - Please Help me Cool OffSo hot......Huh? How did you know?In this condition, I'm too weak to get up...I'll have to enlist the help of Kirari... "You gotta bring me something to help cool off"... and, sentAh... She already replied... Wait-"Anzu-chan, you're wearing your t-shirt that says 'Heat Exhaustion', aren'tcha✩""That's seriously not helping"Great Success✩"Because-""I installed a tiny camera in your bunny so I can keep an eye on you, any time and any place~✩"You're kidding, right-!?Are you for real...!? That's terrifying-!!The truth is, I just heard it from P-chan~♪