[It'd feel like this, like his chest is tight enough to burst, even if it was the lightest hug ever tbh. Always does. He tries to get his arms around him better too, sinking into the hug, fierce even if he trembles. Even when his voice and the rest of him trembles, it seems all the more important to answer whatever would make Shiro feel hesitant, whether he understands why or not.]
Shiro... Me too. I -- [There's no words for everything he feels, even now, but he's pushing past whatever he'd been unable to verbalize until now, all instinct and intensity.] I love you so much.