[Casey hears that sleepy message from Flapjack and recognizes the implication beneath it. This isn't something that can be conveyed through chirps and interpretation.

He gives Hunter one last nuzzle, then climbs off his lap to sit at his side instead, shifting back into his human form. Only then does he nod in answer to Hunter's question.]

I mean it. It isn't just you, either. Leo wants to bring Peter. Rue said maybe they'd come with us, too. Everyone's going back to New York. I… I'd really like it if you came, too. If you wanted.

[Even if they weren't now a couple, he'd want that. He would miss Hunter terribly if they were separated, spirited off to different worlds and never to meet again. More than that, he doesn't want Hunter to have to go back to being alone in a dangerous world.]