[Shivers so much when he does that, and perhaps just as much as Fuuma can't look at Kamui, he finds he can't look away, still almost mesmerized by him, just...]
[His voice is a quiet whisper.]
I'll hold you to that. [Starting to stand up, while even then he looks at him, his movements slow and hesitant at first--when he finally makes himself look away, it's to turn his back, to set some distance between them and change his form again while the remaining magic inside let him do so undetected.
And maybe because if he's like this it might be easier to keep from turning back, in the end. With the change, his voice carries a lingering rumble, his wings opening slowly.]