"Not everything dies, Sora," Riku said gently. "And life continues, regardless." The world didn't stop in the winter.
Riku made sure to accidently get them hot chocolate, complete with whipped cream and chocolate sprinkles (since they had red for the holidays, but Sora didn't like red), and dabbed Sora on the nose with it, because he could.
When it got too cold, they headed back to the dorm to study and so that Sora could work on his essay.