I know. [And he does know, he realizes there's no way he couldn't know this on Shiro's part too, no matter how painful everything has all been, how the weight of it hangs over them whether they want it to or not. He knows it'll take them time to sort through it all, but he's also never been more determined to be by Shiro's side through it all.]
I know, Shiro.
[There's no push in the words, just an answer and reassurance to it, love offered and accepted without expectation, without condition. He's holding him firmer as he practically feels the exhaustion wash over Shiro and - he does let his lips press faintly to his temple in the end just from the proximity of it, then ducks his head down a little so that he can press his face a little into him, staying curled into each other like that. It's okay. They love each other. He has you. They're going to be okay.]