The size of the smile hardly mattered. It was the emotion behind it. Which was bittersweet in how warm it was, as that sort seemed to be more rare than not. They're the kind he keeps the closest to him.
He gently squeezed her hand in turn. The other finally opening the door to lead her in.
"It's because of you." So very much. No matter what she thinks or says. "Yuuki never stopped lifting me up with everything you have. I wouldn't be where I am, or who I am, without all of what you've given me." His brows slightly knit, but he's smiling still. "Meeting you has been a blessing. I wouldn't change a thing."