"I wrote to my friend Tamaki," Kyouya explained to Duck. After waiting a short time, he opened the mailbox and took out the letter from Tamaki. "There, you see? Too quickly to have been delivered by anything except...well, I suppose 'magic.' Anything else you want to test?" he asked Setsuna and Duck.

Of course, while Tamaki was certain to be obedient whether or not Kyouya explained himself, he sent off a quick reply.

Tamaki,

Don't be stupid. I'm testing something about the mail system with Setsuna and a girl named Duck.

Thank you for the quick response,

Kyouya