It was a fake smile, and Shiro could tell it was fake, but he had no idea why it was fake. Obviously this kid was hiding something, and that put Shiro on guard. Lost in the woods, an important demon sword gone, and a half-demon kid just happened to turn up? Yeah, he wasn't buying it.

But for that moment, Shiro decided to answer Rin's question. "Your face is familiar, which is why I asked. What's your brother's name?"

If he knew that this was his son from the future, he would have laughed and denied it. Because obviously a high-ranking exorcist like himself wouldn't adopt any children of Satan, that was unthinkable to him.