They aren't, but...Kaiba finds he isn't entirely honest about threatening to put Yuugi out on the street. Not after what they'd shared tonight, even if he overate off of this strange, blood-generating man.

"Hmph."

He takes his seat back on the couch, his expression cold and distant. Yuugi's expression isn't wholly unpleasant to look at, Kaiba has to admit. He's never seen someone smile so earnestly.

And yet...

"What are you smiling about? That was childish."