It works out rather well, really, and once they're pushed far enough down to his knees, Sizhui's hand moves again and he trails his fingers along the underside of Itto's cock. Just the slightest tease to gauge his reaction while his own legs shift somewhat, an antsy motion that conveys his excitement and the pleasure he gets from Itto playing with his hair as he does. He whimpers quietly at the nip, swallowing down the moan that follows then darting his tongue across Itto's lips again without hesitation, the hand finally wrapping around his dick and giving a full-length stroke.

“So do you and don't worry, I'll give you more.” He lets his tongue delve inside Itto's mouth, kissing him deeper, adjusting his position on the seat and swinging a leg over both of Itto's, this way he's straddling his lap, his opposite arm moving to hook around the other man's shoulders to steady the faint wobble in his body when those hands drift down his back; it wouldn't do to make a fool of himself, not after they've just gotten started.