[His head tips back just a tiny bit at that, short breaths passing through his lips just a bit heavily in the momentary pause. He has his eyes half-lidded but focusing on Shiro with an intensity to match his kiss and he only lets him play with his bottom lip for as long as it takes him shiver from the touch down his back - then he's kissing Shiro again more, pressing into him, and if it almost feels like he's mouthing the word mine into the kiss.... Well.]