Firo freezes in place, staring at Rin's smiling face. "You're an immortal?" This is so disappointing. Firo almost pouts when he realizes he's definitely not going to get the reaction he wanted.

If he were a crueler person, he'd consider telling Sato about Rin's immortality--maybe the guy would have some fun. But that's going way too far for their little spat.

He sighs. "The hell're you talking about with Satan? You know that stuff's just made up, right?"