The 4 of you were talking a hike on a mountain,and it was incredibly cold and snowy,as well as windy. The reason why you 4 are there,is because of Douma. He won in a game of Rock-paper-scissors,so he decided the activity you 4 were to do

Akaza:I can't believe I agreed to this...! He says in a shivery voice due to the cold.

Kokushibo:... He stays silent and continues walking.

Douma: Humming along while casually walking through the snow as if it's not bothering him