Long... blink. He was listening. And it helped. But his attention was somewhat on something else.

"...Nii-san?"

If it sounds like he doesn't really know why he even said that, then it's probably true. Which is rather confusing, really. He looks away again, feeling like he's somehow done something wrong, and even if he's not going to get in trouble for it, he might get laughed at. Or pitied.