The Slytherin gave a smile back to the Professor when the man had greeted him and sat down. His facial expression was completely different than when he had been in his office. It was calm and collect, not showing any signs that something was bothering him. He had always done this since the day he came to Hogwarts, using a mask to cover up his true feelings so he kind of was a master in it. The only one who saw through it most of the time was Kurumi but she wasn't here anymore.

"Well, isn't it that the deeper you go in to the forest the thicker the trees and the darker it gets? So i would look at the sky from time to time to and when the view gets blocked by the leaves i'd turn around and walk the other way." He was pretty sure that the answer had something to do with some kind of star that they could follow but since a few already mentioned that he decided to twist it a little.