"Then get six sandwiches, old man," Derek says with a teasing laugh. "You're letting me crash with you, after. Me and my cat."

They order their food and Derek insists on paying, and then he eagerly takes his tray and leads them to a table that's off in the corner sort of by itself. He plops down into it and gets three bites into a sandwich before he even acknowledges Luke's presence. "What are the differences?"

He cocks his head and watches Luke curiously, licking mustard from the corner of his mouth. "You're wearing glasses, for one."