[There's a short moment of self-consciousness that he can't push away-- you're the first human ever to see him in this appearance, not even any other dragons than his brother have ever seen his half-human form-- and he looks away, the intent gaze making him more than a little embarrassed.
He isn't able to dwell on that for long, though, as the moment Seisirou leans in all his thoughts dissolve into an incoherent mess; his arms going immediately around Seishirou's shoulders, resting at the back of his neck, clinging and holding to him tightly as he responds to the kiss just as hard, without hesitation]