[He feels it so entirely, maybe because a similar rush of that desperation crashes through Keith too the more they settle with the reality of the situation undeniable to them both, and he fixes his arms around him more tightly in answer to the effort Shiro makes, that Keith doesn't miss even though his energy is understandably spent. Keith holds him like he wishes he could give him all the rest of his own last scraps of strength, to share it between them both somehow just so he can keep steady all the while.]
I swear. [He says in a murmur that doesn't lose the intensity, or intent, or comfort he wants to convey despite the fact that the words are soft as his breath.] You'll have me, always.