[The grin isn't keen on fading, even as he takes the sunglasses out of their box and puts them on, pushed up into dark hair (because if he tried to wear them properly he'd just go blind in the dark of the club). Of course, he's never heard of that store, but it doesn't surprise him Prompto was able to uncover it.]

Thanks for finding an accessory to match my shirt.

[It's a little sly, but at least he doesn't tack Sunshine onto the end of that as is his tendency.]

I'll have to take a rain check on your gift tonight, but I'll get you something too, okay? What do you want?

[He doesn't feel bad for not doing it -- assumed it was known between the two of them that they wouldn't -- but he's not going to let Prompto get away with it one-sided. Cain isn't the type, he doesn't like an uneven scale.]