Finally a chapter where Choki-chan doesn't seem hopelessly aloof. She's presented with emotions that aren't totally straightforward and she's distressed by them, and that's character growth, baby.
Yukihira is going to get scared of monsters and run off, leaving Arima alone, but Miyahara will come along and watch the stars with him in the end. He'll think, "this is ok too".
Urano gets it.