He DID think it was a wedding invitation. And... he was glad for them. This was a wonderful thing for them, and for Caloria. Riku just... wished it was him instead, announcing his engagement. He glanced down at his hand. Even though it was done hastily, and without much emotion on Yuuri's part, he had still given Wolfram a ring. And he and Sora, who were actually in love, were still waiting on permission.
But Riku smiled anyway. "My that is soon!" Sora was so excited. Riku wasn't about to bring him down.
"To be sure, I will make sure to tell them my best stories. Even Wolfram will be impressed and forget to be a brat." It was his wedding, how could he be a brat anyway during that? Huh, he wondered if anyone had talked to Yuuri and Wolfram about.... stuff. Wolfram had two older brothers, but neither seemed the type to talk about intimate things with their youngest brother.
"I am sure we will think of something appropriate," well, Riku had no idea, but he was sure Master Zexion did. Or the Princess and her Mother the Queen. "We must visit the tailor though, and have something made fit for the wedding. I am CERTAIN your sister the Princess would want to come, and will be upset if we leave her at home."