"Yay!" Sora climbed out, excited with the prospect of food. Though, what teenage boy wasn't? Riku's house was like a second home to him, so he didn't hesitate to go inside, take off his shoes and jacket, toss his backpack around, and whatnot.
Tsuna however, had only been there about once. And he found it extremely awkward to be going inside. He stayed nearby his brother, because he otherwise wouldn't have the courage to just go inside and probably would have stood around on the porch waiting to be asked in.