With casualness that most people can't pull off, especially while carrying several blood packets, he hits them both on the top of the head. He doesn't want to deal with kids but if they're going to go around mistaking him for other people, he ends up feeling responsible for them. A feeling he hates of course.

"Both of you shut up. We're going to find someone who can explain why the hell you would think I was your mother now. And if either of you make me drop these valuable packets I'm going to get pissed." Back to dragging Masaru by the back of his shirt.