[Holds him closer when he feels that trembling, a hand brushing up the back of his neck, lips pressing to his temple, pretending that he doesn't notice that he's trembling in turn.]
Everything. [Echoes him quietly, a little wobbly. Conveying it back to him just as much as understanding the way Shiro means it to him, with just a bit of a nod against him.] Yeah. I know, I...
[Maybe in the end he can't help but hold on and hope that it'll be enough.] You're everything that matters to me.