What's Going on?: "That couple!"

Miki's class is going on their trip to Hokkaido. Miki and Meiko are in the same group and Yuu and Ginta are in the same group. Miki's group goes on their tour; they star with the tower in Hokkaido. Miki takes a second to see the gift shop; she turns around and they're gone. She goes and looks for them and finds Yuu and Ginta instead. Then Arimi randomly comes and grabs Ginta's arm. Does this bother Miki?