C246 The Big Case

She called me big brother, and when I turned around, I saw that it was Prof. Wang's precious granddaughter. I nodded, and then she walked up and said, "Big brother, are you here to find Grandfather?"

I said yes.

The little girl was probably a little excited to see me, so she held my hand and ran up excitedly.

However, she didn't run upstairs, but downstairs