Riku wasn't expecting the Prince... latch himself onto him so fiercely. It made him wonder if it was really just a case of the Prince wanting him to be home in the evenings. Had he had a bad dream or something? Couldn't someone have, you know, mentioned that?
"Shh," Riku murmured, pressing his lips to the Prince's forehead. "Shh, Sora." It was alright. He was here now, it was going to be okay. "I love you, Sora," Riku whispered softly, tilting the Prince's face up to kiss him properly. "I love you very much."
Riku rubbing his hand gently in circles over the Prince's back. "Do you want to talk about it?" Now that the Prince was safe, and had Riku close and not going anywhere.